Which statement is true?
• A.
A sample statistic can never be equal to the population parameter.
O B. Point estimates are defined for both samples and populations.
O C.
To calculate a sample proportion, we
need to know the population size
O D.
To calculate a point estimate, we
need to know the sample size.
Answers
To calculate a point estimate, we need to know the sample size.
===========================================================
Explanation:
Let's go through the answer choices.
A) False. A sample statistic could equal to the population parameter. It won't always happen, but it might happen sometimes (in rare cases). B) False. Point estimates are only defined for populations. They estimate a population parameter. For example, the sample mean xbar is a point estimate of the population mean (mu).C) False. In practice, we will hardly know anything about the population. This includes the population size. The goal of statistics is to measure population parameters by using sample statistics as estimation methods.D) True. We can easily calculate the sample size because it is relatively much smaller compared to the population. Plus, when selecting the sample, the sample size is often pre-determined to some set number. The sample size will help us determine things like the sample mean and the sample proportion.Related Questions
please help with this i’ll give brainliest
Answers
Answer:
Answer to part A:
1 notebook = $2.5
1 pen = $1.5
Answer to part B:
= 3 pens.
Step-by-step explanation:
Here's the simultaneous equation.4n + 3p = $14.50
5n + 6p = $21.50
Multiply the numerator by the denominators first number and vice-versa.5(4n + 3p) = $14.50
4(5n + 6p) =$ 21.50
Here's what you should get.20n + 15p = $72.50
20n + 24p = $86
Eliminate the like numbers by subtracting the denominator from the numerator.20n - 20n = 0
15p - 24p = -9p
$72.50 - $86 = -$13.5
Divide the result after the equal sign by the result before the equal sign.-$13.5 ÷ -9 = $1.5p
Since we've found the cost of one pen as $1.5, lets substitute any of the first equations to get the cost of one notebook.4n + 3p = $14.50
4n + 3($1.5) = $14.50
4n + $4.5 = $14.50
4n = $14.50 - $4.5
4n = $10.00
n = $2.5
Here's the answer to part A:1 notebook = $2.5
1 pen = $1.5
Part B::::::::::::::::::1 ($1.5) = 3($2.5)
$1.5 + $7.5 = $9.0
$27 ÷ 9 = $3
Therefore, she'll buy each supply thrice:3 ( $1.5 + $7.5 ) = 3 ( $9.0 )
( $4.5 + $22.5 ) = ( $27 )
$4.5 + $22.5 = $27
Answer to part B:= 3 pens.
A rectangle measured 3/4 units long and 1/3 unit wide. find the area.
Answers
Area of a rectangle = length * width
____________________
Then
The Area = (3/4)*(1/3) =(3*1)/(4*3)=3/12=1/4
can you help me solve this problem ???
Answers
Step-by-step explanation:
2nd one
we need 3 2/5 that is 3+ 2/5
-7 1/5 = -7-1/5
so 2nd one
find the inverse of y=ln2x
Answers
Answer:
The exponential function, exp : R → (0,∞), is the inverse of the natural logarithm, that is, exp(x) = y ⇔ x = ln(y). Remark: Since ln(1) = 0, then exp(0) = 1. Since ln(e) = 1, then exp(1) = e.
Step-by-step explanation:The exponential function, exp : R → (0,∞), is the inverse of the natural logarithm, that is, exp(x) = y ⇔ x = ln(y). Remark: Since ln(1) = 0, then exp(0) = 1. Since ln(e) = 1, then exp(1) = e.
Is 10/8 x 20 greater than or less than 20? Please explain!
Answers
Here is a balanced hangar. A circle has a mass of 3 grams and a square has a mass of 2 grams. Which is the mass of a triangle? 3 grams. 7/5grams 9/6 11 grams
Answers
Answer:
Step-by-step explanation:
Givens
Circle: 3 grams Number: 1 right hand side Number LHS: 2
Square: 2 grams Number: 2 Number LHS: 5
Triangle: x Number: 5 Number LHS: 2
Formula
Mass RHS = Mass LHS
Solution
3*1 + 2*2 + 5x = 3*2 + 5*2 + 2*x Combine
3 + 2 + 5x = 6 + 10 + 2x
5 + 5x = 16 + 2x Subtract 5 from both sides
5-5+5x = 16-5 + 2x Combine
5x = 11 + 2x Subtract 2x from both sides
3x = 11 Divide by 3
x = 11/3
As you can see, I'm not getting any of the answers that you have provided. Ask your teacher how it was done. (The method used is correct).
Pls help me with those 2 pls help get this corrected
Answers
Answer:
this question have the 552.792 and centimeters of square
what is the radius of a circle with a area of 112 square inches
Answers
Answer:
[tex]\displaystyle 5,9708213214...\:in.[/tex]
Step-by-step explanation:
[tex]\displaystyle {\pi}r^2 = A \\ \\ \frac{{\pi}r^2}{\pi} = \frac{112}{\pi} \hookrightarrow \sqrt{35,650707253...} = \sqrt{r^2} \\ \\ \boxed{5,9708213214... = r}[/tex]
I am joyous to assist you at any time.
Pattern A follows the rule "add 3" and Pattern B follows the rule "add 4." Pattern A 1 4 7 10 13 Pattern B 5 9 13 17 21 Which ordered pairs are formed from combining a term in Pattern A with its corresponding term in Pattern B? Select all correct answers. (4, 13) (1, 4) (1, 5) (13, 17) (10, 17) (7, 13)
Answers
Answer:
(1,5) (7,13) (10,17) (7,13)
Step-by-step explanation:
1 4 7 10 13
5 9 13 17 21
select the place where the digit 2 sits in this number 428,031 what is the answer
Answers
Answer:
The ten-thousands place. :)
Step-by-step explanation:
Answer:
Ten thousands place.
Kevin started his science test at 2:43p.m. and finished the test 75 minutes later. Kevin has football practice at 4:15p.m. How much time did kevin have between the end of the end of the test and the beginning of football practice?
Answers
17min
hope it helps...!!
Answer:
17 minutes
Step-by-step explanation:
Between 2:43 pm and 3:00 pm is 17 minutes. This means that by 3:00 pm, Kevin will have spent 58 minutes (75-17). By 3:58 pm, Kevin will have been done with this test. From 3:58 pm to 4:00 pm is 2 minutes in addition to the 15 minutes (4:15 pm) is 17 between the end of the test and the beginning of football practice.
Frank needs to pay R60 000,00 towards his son’s university fees in three years’ time. If he has R46 150,30 now, at what interest rate per year compounded monthly, must he invest his money? [1] 10,00% per year compounded monthly [2] 8,78% per year compounded monthly [3] 2,50% per year compounded monthly [4] 13,16% per year compounded monthly
Answers
The interest rate Mr Frank must invest his money is at 10% per year compounded monthly
That is option 1.
Calculation of interest ratesThe amount for Mr Frank's son school fees = R60 000.00
Cash at hand( principal amount) = R46 150.30
Therefore the simple interest needed to make up R60 000.00= R60 000.00 - R46 150.30= 14,849.70
Time of investment = 3 years
Therefore the rate = simple interest × 100/ principal×time
Rate (R) = 14,849.70 × 100/ 46 150.30× 3
= 1,484,970/135,450.9
= 10.0%
Therefore, the interest rate Mr Frank must invest his money is at 10% per year compounded monthly.
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A savings account balance is compounded annually. If the interest rate is 2.7% per year and the current balance is $4,228.00, in how many years will the balance reach $5,518.73?
Answers
The number of years it will take the balance to reach $5,518.73 with annual compounding is 9.87 years.
When will the balance reach $5,518.73?When an account earns annual compounding, it means that both the interest accrued and the amount deposited increases in value once a year.
The formula that can be used to determine the number of years is:
Number of years = (In FV / PV) / r
FV = future valuePV = present valuer = interest rate(in 5518.73/4228) / 0.027 = 9.87 years
To learn more about how to determine the number of years, please check: https://brainly.com/question/21841217
The difference between 32.6 and a number is 10.2
Answers
Answer:
22.4
Step-by-step explanation:
Let that number be " x ".
The difference between 32.6 and a number is 10.2
32.6 - x = 10.2
Add x on both sides,
32.6 - x + x = 10.2 + x
32.6 = 10.2 + x
10.2 + x = 32.6
Substract x on both sides,
10.2 - 10.2 + x = 32.6 - 10.2
x = 22.4
Therefore,
The number is 22.4
Answer:
22.4
Step-by-step explanation:
First we can make an equation to find the unknown number:
Difference mean subtraction:
32.6 - x = 10.2
To do this we can subtract 32.6 from both sides to isolate -x or to make -x the subject:
32.6-x-32.6 = 10.2 - 32.6
-x = -22.4
Now we can multiply both sides by -1 to make x positive:
-(-x) = -(-22.4)
x= 22.4
Find the measures of the interior angles.
Answers
costheta =12/13, 3pi/2
Answers
QUESTION 1
[tex]cos\ \theta = \frac{12}{13}\\\theta = cos^{-1}\frac{12}{13} = 22.62\textdegree = 0.3948\ (\text{radians})[/tex]
QUESTION 2
[tex]\frac{3\pi}{2} < \theta < 2\pi\ \text{then find}\ sin(2\theta)[/tex]
First, the fact that we have [tex]sin(2\theta)[/tex] means we have to adjust our range
[tex]\frac{3\pi}{2} < \theta < 2\pi\ \ \text{becomes}\ \ 3\pi < 2\theta < 4\pi\[/tex]
[tex]sin\ 2\theta = \frac{3\pi}{2}\\2\theta = sin^{-1} \frac{3\pi}{2}\\2\theta = \text{error}[/tex]
There are no solutions to inverse sin of [tex]\frac{3\pi}{2}\\[/tex]
Amy is considering visiting her new friend at one of his beach houses in Florida. She really loves the
warm weather, so she would like to choose to go somewhere with a high median temperature, and a
small interquartile range. Which place should she choose to visit?
Ft. Meyers
Jacksonville Beach
I
Pensacola Beach
Destin
HI
70 75 80 85
*To 75 80 B5 S5 10
Answers
Answer:
Destin
Step-by-step explanation:
Only one that passes 85
Amy is considering visiting her new friend at one of his beach houses she chooses to visit Destin and 85.
Amy is considering visiting her new friend at one of his beach houses in Florida.
She really loves the warm weather,
So she would like to choose to go somewhere with a high median temperature, and a small interquartile range.
We have to determine the place should she choose to visit.
What is the interquartile range?
The interquartile range is a measure of where the middle fifty is in a data set.
Destin HI 70 75 80 85.
Here She can choose the 4th position and which is 85.
The only one that passes 85.
Amy is considering visiting her new friend at one of his beach houses she chooses to visit Destin and 85.
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Doctor orders 100mg of amiordarone the bottle concentration is 5 mg/ml how many ml do you give?
Answers
Answer:
20 ml
Step-by-step explanation:
100 mg / ( 5mg /ml) = 20 ml
If I have read a book at a rate of 20 chapters per hour. How many chapters does she read in 4 hours
Answers
20 × 4 = 80chapters
hope it helps...!!!
if f(x)=2x^2+3x-6 what is the value of f(2)
Answers
Answer:
8
Step-by-step explanation:
put in '2' where 'x' is
2 (2^2) + 3 ( 2) - 6 = 8
OLZ HELP ILL MARK AS BRAINLEST
Which sentence provides supporting evidence for the inference "Sam is a 2 points writer with natural talent"? * Sam published his first book, a collection of poetry, at the age of 16. Sam hoped that one day he would live in Paris, a city brimming with inspiration. O Sam was thoroughly interested in his English teacher's lecture that day. Sam loved to read the letters his grandfather wrote to his grandmother when they were young
Answers
Answer:
Step-by-step explanation:
Sam published his first book, a collection of poetry, at the age of 16.
A triangle has sides with lengths of 12 meters, 16 meters, and 20 meters. Is it a right
triangle?
yes
no
Answers
The greatest integer function, shown below, is defined so that it produces the greatest integer___
or equal to x.
fx) = [[x]]
Answers
Answer:
The answer is x(4)
Step-by-step explanation:
you multiply
6) Out of 15 students only 10 passed the geography scam. Write the fraction of students
Who failed in the geography cam.
Answers
Answer:
5/15
Step-by-step explanation:
15 students and 10 passed which means 5 failed
Answer:
The fraction is 1/3 or one-third.
Step-by-step explanation:
Have you smiled today? its very important:)
Judy earns $11.80 per hour working part time at a restuarant. How much money will she earn for 5 hours? NO DOLLAR SIGN IN YOUR ANSWER!The area of a rectangular city park is 15/56 square miles the width of the park is 3/7 miles what is length in miles of the park.
Answers
Answer:
Question 1: 59
Step-by-step explanation:
Question 1: 11.80*5=59
Reading box plots
Find the interquartile range (IQR) of the data in the box plot below.
math problems
Number of math problems
assigned by Ms. O'Brien
Answers
Look at the screenshot.
A farmer plants crops on 60 acres of land. The circle graph shows the percentages of land used for some of the different types of crops.
Land for Crops
Corn
30%
Squash
45%
Other
5%
Carrots
Based on the circle graph, how many acres of land are used for carrots? TEKS 7.6G
Answers
Answer:
12 acres
Step-by-step explanation:
30+45+5 = 80 so theres 20% left.
20% of 60 is 12
Emma and Ellie are twins and their birth weight can be compared using a scale of 0.75 pounds:0.9 pounds. If Emma weighed 6.4 pounds at birth, how much did Ellie weigh?
Answers
By comparism using the given scale ratio, the weight of Ellie at birth is 7.7pounds.
What is Ratio?Ratio simply compares values, it shows how much of one thing is related or compared to another thing.
Given the data in the question;
Scale of Emma SEmma = 0.75poundsScale of Emma SEllie = 0.9poundsWeight of Emma WEmma = 6.4poundsWeight of Ellie WEllie = XTo determine the weight of Ellie, we simply say;
0.75pounds : 0.9pounds = 6.4pounds : X
0.75pounds / 0.9pounds = 6.4pounds / X
Cross multiply
0.75pounds × X = 0.9pounds × 6.4pounds
0.75pounds × X = 5.76pounds²
X = 5.76pounds² / 0.75pounds
X = 7.68pounds
X = 7.7pounds
Therefore, by comparism using the given scale ratio, the weight of Ellie at birth is 7.7pounds.
Learn more about ratio here: https://brainly.com/question/13419413
Year
1990
1995
2000
2005
2010
Cell Phone
Subscribers (millions)
4.9
38.3
118.1
229.8
360.4
Use the exponential regression to find an
equation that fits the data, where x is the years
since 1990.
Answers
The exponential regression that shows the relationship between the number of subcribers in millions (y) since 1990 is y = 4.9(1.37)ˣ
How to solve an exponential function?Let y represent the amount of subscribers in millions, x years since 1990.
From the table; at point (0, 4.9):
y= abˣ
4.9 = ab⁰
a = 4.9
At point (10, 118.1)
118.1 = 4.9(b)¹⁰
b = 1.37
The exponential regression that shows the relationship between the number of subcribers in millions (y) since 1990 is y = 4.9(1.37)ˣ
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1: The dimensions of a solid, rectangular block are in the ratio of 5 : 4:3. If the volume is equal to the volume of a cube of side 28 cm, find the length of the longest side of the cuboid, giving your answer correct to 1 decimal place.
Answers
Answer:
Given, the dimension of a rectangular block in from of cuboid is in the ratio 5:4:3. The volume of the block is equal to the volume of cube of length 28 cm. Let the length , breadth and height of the cuboid be 5x , 4x and 3x respectively. Therefore the length of the longest side of the cuboid is = (7.2×5)cm=36 cm.
Step-by-step explanation: