Suppose the average score on a national test is 600,with a standard deviation of 50. If each score is increased by 10, what are the new mean and standard deviation

Answers

Answer 1

On solving the provided question we can say that the new Mean = 610 mean .

What is mean?

A dataset's mean is the sum of all values divided by the total number of values, often known as the arithmetic mean (as opposed to the geometric mean). is 50.

What is mean?

A dataset's mean is the sum of all values divided by the total number of values, often known as the arithmetic mean (as opposed to the geometric mean).

The mean score is calculated by dividing the total number of tests taken by all of the scores. The mean will therefore rise if you give each test a higher mark. The standard deviation is calculated as the square root of the product of the power of two of all test results, multiplied by the number of tests, and then subtracted from the mean.

Each score you raise by 10 will result in a 10 change in the mean. But as there will be no change in the distance between each score and the mean, the standard deviations will also not change.

Mean = 600

Average deviation is 50.

Scores went up by 10

Mean = 610

Average deviation is 50.

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Related Questions

A frictionless pendulum is pulled 3 feet to one side of its center resting point…

Answers

A. The amplitude of the sinusoidal function 's' would increase.

B. The midline of the sinusoidal curve will upshift.

What is a periodic function?

A function that repeats its values at regular intervals is said to be periodic. For instance, periodic functions include trigonometric functions, which repeat every 2 pi radian. In science, periodic functions are used to describe oscillations, waves, and other periodic events. Aperiodic refers to any nonperiodic function.

We know the moving mechanism of the pendulum can be graphed as a periodic function.

A. If the pendulum is pulled farther away from its resting point it will reach a greater height on both sides this would have an effect of an increase in the amplitude of the sinusoidal curve.

B. If the pendulum is pulled farther away from its resting point the midline of the sinusoidal curve would move up along the y direction as a result of an increase in magnitude.

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What is the midpoint of the x intercepts of x 4 )( x 4?

Answers

The midpoint of the x-intercepts of f(x) = (x - 4)(x + 4) is (0, 0).

The midpoint of a line segment is known as the midpoint in geometry. It is the centroid of the segment and of the ends, and it is equally distant from both of them. It cuts the section in half.

A compass and straightedge setup can be used to locate the midpoint of the line segment they determine given two points of interest. By initially building a lens out of circular arcs with equal radii centered at the two endpoints and joining the cusps of the lens, one can determine the midpoint of a line segment immersed in a plane. The midpoint of the segment is then the place where the line joining the cusps intersects the segment.

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The probability distribution for a random variable x is given in the table.
Find the probability that
-2

Answers

Step-by-step explanation:

[tex]P( - 2 \leqslant x \leqslant 2) = 0.33 + 0.16 + 0.11 \\ = 0.6[/tex]

GIVING BRAINLIEST AND MANY POINTS FOR ANSWER I BEG PLEASE PLEASE


1. Use the Distributive Property to simplify the expression.
6(5 - q)



Group of answer choices

11 - 6q

11 - q

30 - 6q

1 - q

3.
Use the Distributive Property to simplify the expression.

(d + 2)(-7)



Group of answer choices

-7d - 14 OR -7d + -14

7d - 2 OR 7d + -2

d - 14 OR d + -14

d - 5 OR d + -5

4. Use the Distributive Property to simplify the expression.

-4(x - 6y)





Group of answer choices

4x + 24y

-4x + 24y

4x - 1.5y

-4x - 10y


5. Use the Distributive Property to simplify each expression.

a) -3(5 + b)

=
[ Select ]
+
[ Select ]
b



b) 3(-4x + 8)

=
[ Select ]
x +
[ Select ]


6. The table shows different prices of items at a movie theater.

Item Cost ($)
box of candy 2.25
drink 3.25
popcorn 4.50
ticket 7.50


Suppose Mina and her two friends want to go to the movies.

Which expression could be used to find the total cost if each of them buy one of each item?


[ Select ]


What is the total cost for all three people?

$
[ Select ]

Answers

Answer:

1. 30 − 6q

3. −7d − 14 OR -7d + -14

4. = −4x + 24y

5. a) −3b − 15           b)−12x + 24

6. For the first answer to this question: 3x + 3y OR 3x = t

For the second answer to this question: 3x = t and it costs 15 dollars in total with x = 5.

Please help me! Find the circumference of the circle

Answers

Answer:

convert to cmthen write the perimeter of the circle and solve

5)48 I need help I suck at math

Answers

On solving the question resultant answer from the given data we have  algebraic  expression 5/48 could be  0.10

what is an algebraic expression ?

Algebraic expression can be defined as the combination of  constants , variables and operators. Algebraic expressions are the concept of expressing numbers using letters or alphabets without specifying their real values. The basics of algebra taught us a way to specific an unknown value the usage of letters which includes x, y, z, and many others. those letters are called here as variables. An algebraic expression may be a combination of each variables and constants. Any value this is positioned before and increased through a variable is a coefficient.

So, the given expression , 5/48

5/48 = 0.10

The resultant answer from the given expression 5/48 could be 0.10

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The correct question is -

Solve the equation.

p= −6p=48

Please help I suck at math

does the parabola open up or down -5(x-4)^2-3

Answers

The parabola opens Down

what is an equation of the line that passes through the point (8,-7) and is parallel to the line 5x+4y=16

Answers

keeping in mind that parallel lines have exactly the same slope, let's check for the slope of the equation above

[tex]5x+4y=16\implies 4y=-5x+16\implies y=\cfrac{-5x+16}{4} \\\\\\ y=\stackrel{\stackrel{m}{\downarrow }}{-\cfrac{5}{4}}x+4\qquad \impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}[/tex]

so we're really looking for the equation of a line whose slope is -5/4 and it passes through (8 , -7)

[tex](\stackrel{x_1}{8}~,~\stackrel{y_1}{-7})\hspace{10em} \stackrel{slope}{m} ~=~ - \cfrac{5}{4} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{(-7)}=\stackrel{m}{- \cfrac{5}{4}}(x-\stackrel{x_1}{8}) \implies y +7= -\cfrac{5}{4} (x -8) \\\\\\ y+7=-\cfrac{5}{4}x+10\implies {\Large \begin{array}{llll} y=-\cfrac{5}{4}x+3 \end{array}}[/tex]

Solve (x – 3)2 = 49. Select the values of x. –46 -4 10 52

Answers

Answer: 27.5

Step-by-step explanation:

[tex](x-3)2 = 49\\x-3 = \frac{49}{2} \\x-3 = 24.5\\x = 24.5 + 3\\x = 27.5[/tex]

Which side lengths form a right triangle?

Answers

Answer:

(a) and (c)

Step-by-step explanation:

if you use the pythagorean theorem, 'a' and 'c' work out

a) 3² + [tex]\sqrt{27}[/tex]² = 36   True

b) 8² + 15² ≠ 17²      False

c) 5² + 5² = 50       True

the answer is a and c the person above me is correct mark them brainlist

ILL BRAINLIEST YOU PLEASE HELP ME

Answers

Answer:

Option C

The length of RT is 14

Step-by-step explanation:

For a given Right Triangle

m∠R = 90°, RG = 17, TG = 22

Now, By Pythagoras Theorem

(RT)² + (RG)² = (TG)²

(RT)² = (TG)² - (RG)²

(RT)² = (22)² - (17)²

(RT)² = 484 - 289

(RT)² = 195

RT = √195

RT = √195 = 13.96 = 14

Thus, The length of RT is 14

-TheUnknownScientist

Identify the figure that illustrates "a reflection in line k."

Answers

Answer:

A

Step-by-step explanation:

The figure that illustrates a reflection in line k is figure A.

What is Reflection?

A perpendicular bisector is a reflecting line. The perpendicular bisector of all segments connecting the pre-image points to their matching image points forms the reflecting line while a figure is reflecting.

We have a figure.

We have to determine the correct option a reflection in line k.

So, the line k must lie in between the figure and gives the mirror image of each other.

Also, line should be at equal distance from both figure.

Thus, the figure that illustrates a reflection in line k is figure A.

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GUYS PLEASE HELP ME I WILL GIVE BRAINLIEST, 5 STARS, AND EVERYTHING! THANKS!

Answers

Answer:

3

Step-by-step explanation:

C(n) = 5n, 0 ≤ n ≤ 10       You would use this equation for finding the cost of 10 shirts. Since 10 is equal to 10.

C(n) = 5n, 0 ≤ n ≤ 10 ← You can ignore the 0 ≤n ≤10 part.

C(10) = 5(10)                 Input the value 10 as x.

C(10) = 50                    Simplified

Next,

C(n) = 4n + 5, n > 10      You would use this equation for finding the cost of 12shirts. Since 12 is greater than 10.

C(n) = 4n + 5, n > 10  ←  You can ignore the n>10 part.

C(12) = 4(12) + 5, n > 10  Input the value of 12 as x.

C(12) = 48 + 5                 Simplify

C(12) = 53    

Finally,

The question is asking you to find the difference between the cost of 12 shirts and the cost of 10 shirts. So the formula would be C(12) - C(10).

C(12) - C(10)

(53) - (50)                       Input the values of C(12) and C(10).

= 3                                  Simplify.

The answer is 3.

am i this right?? this is graded and no links!!!!!!

Answers

Answer:

Your right

Step-by-step explanation:

Plz help. Describe the impact drought had on west Africa.

Answers

Additional impacts of the drought are death of livestock and poor crop yields due to poor or no rainfall making water unavailable for irrigation. Areas in the Free State and North West provinces of South Africa that are known for corn farming are currently unable to grow enough corn due to the drought.

Find the root of the following equation using Factorization method

√2x² + 7x + 5√2 = 0

Answers

Solution:
Photo below

Answer:

- 5√2 / 2   ,   - √2

Step-by-step explanation:

√2 x² + 7x + 5√2 = 0

√2          5

1              √2

(√2 x + 5) (x + √2) = 0

√2 x + 5 =0            x = - 5/√2 = - 5√2 / 2

or x + √2 = 0          x = -√2

Solve for x in this triangle. Round your answer to the nearest tenth. answer choice's x = 9.1 x = 7.5 x = 10.6 x = 12.4​

Answers

The value of x in the give trigonometrical question is 10.6 when hypotenuse is 13 in the right angled triangle.

What is trigonometry?

Trigonometry is the branch of mathematics that deals with particular functions of angles and how to use them in calculations. There are six common trigonometric uses for an angle. Sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (csc) are their respective names and acronyms.

The figure illustrates these six trigonometric functions in relation to a right triangle. For instance, the triangle has an angle A, and the sine of A, or sin A, is defined as the ratio between the side opposite to A and the side opposite to the right angle (the hypotenuse).

Cos 35° = x/13

0.819152 = x/13

x = 0.819152 × 13

x = 10.6

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You were planning to buy a new smartphone for
$1,100. You only paid $900 for it because it was on sale.
Find the percent of decrease in the cost.

Answers

Answer:

22% decrease

Step-by-step explanation:

(1100-900)/900 = .22

4 pounds divided by 8 as a fraction

Answers

Answer:

4 pounds divided by 8 as a fraction

4/8 = 1/2

-TheUnknownScientist

Answer:

[tex]\frac{1}{2}[/tex]

Step-by-step explanation:

so 4 divided by 8 can be represented in fraction for like this:

[tex]\frac{4}{8}[/tex] which can be simplified by multiplying the top and bottom by 4:

[tex]\frac{4}{8} = \frac{4 \div 4}{8 \div 4} = \frac{1}{2}[/tex] and that is the answer

At Memorial High School, 60 of the 240 freshmen students are on an athletic team sponsored by the school. If the ratio is the same for the sophomore class, how many of the 220 sophomores are NOT athletes

Answers

Answer:

165 students or the sophomore class of 220 are not athletic.

Step-by-step explanation:

60/240 = .25 This means that 25% of the class is athletic.  That would mean and .75 or 75% are not athletic.

220 x .75 = 165

Find the number of real number solutions for the equation.

x2 − 6 = 0


1


2


0

Answers

Answer:

2

Step-by-step explanation:

[tex]25^{a+3}* 5^{3a}[/tex]

Please explain how you got your answer.

Answers

Nice i love precal here how it works
25 can be rewritten as 5^2
[(5^2)a+3]x(5^3a)
Now the base is the same you can add the exponents together! Remember You add exponents when combining them :) So
2a+6+3a
5a+6. Now You solve for a
5a+6=0
5a= -6
a= -6/5
Goodluck! :)

Help me. The question is giving me problems help.

D/3

Answers

The real world situation that can be modelled with the given  expression can be modelled as shown below.

What is expression?In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.

Given is the expression as -

D/3

A real world situation that can be modelled with this expression can be written as follows -

Amanda has a total of {D} bananas. She divides the bananas into 3 of her childrens equally. Write an expression that would represent the amount of bananas recieved by each of her child.

Therefore, the real world situation that can be modelled with the given  expression can be modelled as shown above.

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Nicole randomly selects a red card from a standard deck of cards. What outcome is the complement of drawing a red card?
Selecting an ace
Selecting a heart
Selecting a face card
Selecting a black card

Answers

The complement of the event: "drawing a red card" is the last option:

"Selecting a black card"

What outcome is the complement of drawing a red card?

The complement of an event is the set of all the outcomes such that the original event is false.

For example, the complement of drawing a red card, would be "not drawing a red card"

We know that there are two types of coloes, black and red.

Then "drawing a black card" is equivalent to "not drawing a red card"

Thus, the complement is the last option:

"Selecting a black card"

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A neighbor of yours is getting ready to
plant a garden of flowers in his backyard.
He asks you for ideas on how to
conserve soil. You notice that his
backyard has a lot of hills. What do you
suggest?

Answers

In order to maintain soil fertility and productivity, soil must be protected from erosion and other forms of deterioration. Water use and watershed management are typically included.

What comes first in gardening?

Eliminating the existing vegetation is the first step in making a garden bed. Weeds can be manually pulled. Just be certain to remove the roots to prevent regrowth. You might want to rent a gas-powered sod cutter to get rid of the grass if you're starting with a lawn.

What is an example of soil conservation?

Better soil conservation techniques that affect both erosion and fertility include crop rotation, cover crops, conservation tillage, and installed windbreaks.

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could someone help me

Answers

Answer:

27

180 - 63 - 90  = 27

NEED HELP ASAP

PLEASE REFER TO PICTURE

Answers

Refer to the attached image.

y<3x+12, y≥5x+7
The solution of the system of linear inequalities.

Answers

Answer: nswer ; x , we can find ; y with the first equation :.

1 answer

·

We know that y=5x−7 so we are just going to replace the y in the other equation : −3x−

Step-by-step explanation:

5 1/8+ 6 1/8 in simplest form

Answers

Answer: The answer is 11 1/4

Step-by-step explanation:

There are 250 bricks used to build a wall 20 feet high.How many bricks will be used to buld a wall that is 30 fet high

Answers

Answer: 375

Step-by-step explanation:

Since we are given the information that there are 250 bricks used to build a wall 20 feet high, the number of brick used per feet will be:

= 250/20

= 12.5 bricks per feet.

Therefore, the number of bricks that will be used to buld a wall that is 30 fet high will be:

= 12.5 × 30

= 375 bricks.

Therefore, 375 bricks would be used.

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