
Concept explainers
(a)
To calculate the population,
(a)

Answer to Problem 20E
The population mean is
The value of population standard deviation is
Explanation of Solution
Given information:
Year: Winner | Age |
Formula used:
Obtain the population mean by using the formula is given below:
The formula for population standard deviation is given below.
Calculation:
Obtain the population mean by using the formula is given below:
Thus, the population mean is
Compute tile population standard deviation
Tile formula for population standard deviation is given below:
Substitute
Thus, the value of population standard deviation is
(b)
To calculate the sample space.
(b)

Answer to Problem 20E
The simple random sample of size
Explanation of Solution
Formula used:
Calculation:
The simple random sample of size
(c)
To calculate the mean and standard deviation.
(c)

Answer to Problem 20E
Explanation of Solution
Formula used:
Calculation:
Compute the sample mean
Sample |
Sample |
Sample |
Sample |
||
Compute the mean
Sample |
Sample |
|||
Mean |
Compute the standard deviation
(d)
To calculate the sample, mean for all 25 samples for size 2 and also calculate the
(d)

Answer to Problem 20E
Explanation of Solution
Formula used:
The formula for population standard deviation is given below.
Calculation:
Verify that
Hence
Find the
Thus, the standard deviation of
Hence,
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Chapter 7 Solutions
Elementary Statistics (Text Only)
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- 50 Bone Loss 30 40 20 Scatterplot of Bone Loss vs. Age . [902) 10 50 60 70 80 90 Age a sub adi u xinq (20) E 4 adw I- nyd med ivia .0 What does a scatterplot that shows no linear relationship between X and Y look like?arrow_forwardVariable Temperature (X) Coffees sold (Y) Mean 35.08 29,913 Standard Deviation 16.29 12,174 Correlation -0.741arrow_forward2 Find and interpret the value of r² for the rainfall versus corn data, using the table from Question 14.2291992 b sgen gnome vixists 992 ms up? 2910 1999 bio .blos estos $22 tolqis2 qs rieds ni zoti swoH iisqa vilsen od 1'meo DOV to mogers boangas mus jil Reustar enou Leption20th ) abnuin Hagodt graub 032 Carrow_forward
- 18 Using the results from the rainfall versus corn production data in Question 14, answer oy the following: DOY 98 103 LA Find and interpret the slope in the con- text of this problem. b. Find the Y-intercept in the context of this problem. roy gatiigisve Toy c. Can the Y-intercept be interpreted here? (.ob o grinisq blo eiqmaxs as 101 galwollol edt 998 ds most notamotni er griau sib 952) siqmaxs steb godt llaw worl pun MAarrow_forwardVariable mean standard variation correlation temperature(X) 35.08 16.29. -0,741 coffees sold(Y). 29,913. 12.174.arrow_forward12 ம் Y si to no 1672 1 A medical researcher measures bone density and the age of 125 women; you can see the o lesummary of statistics in the following table. (See the figure in Question 2 for a scatterplot of this data.) a. How well will a line fit this data? b. Find the equation of the best fitting regression line. Variable Mean Standard Correlation Deviation Bone loss (Y) 35.008 7.684 0.574 A Age (X) 19 67.992 10.673 T in send art lo (d) sqala sala bolt 3 esmit sqola ad garrow_forward
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