rey, you test the water hardness in several randomly selected streams. The results are shown below. Con on standard deviation o. Use a 95% level of confidence. Assume that the population has a normal distribu ..... val for the population variance o ? cimal place as needed.) the correct choice below and fill in the answer box(es) to complete your choice. ces as needed.) ce, it can be said that the population variance is less than O B. With 95% confidence, it can be said tha and ce, it can be said that the population variance is greater than O D. With 5% confidence, it can be said that and

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Answer all parts .

+ II
MI
* 00
L
1今4
#3
As part of a water quality survey, you test the water hardness in several randomly selected streams. The results are shown below. Construct a confidence interval for the population
variance of and the population standard deviation o. Use a 95% level of confidence. Assume that the population has a normal distribution.
n= 23
s= 17 grains per gallon
.....
What is the confidence interval for the population variance o?
I D (Round to one decimal place as needed.)
Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice.
(Round to one decimal places as needed.)
O A. With 95% confidence, it can be said that the population variance is less than
OB.
O B. With 95% confidence, it can be said that the population variance is between
pue
O C. With 5% confidence, it can be said that the population variance is greater than
O D. With 5% confidence, it can be said that the population variance is between
pue
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Transcribed Image Text:+ II MI * 00 L 1今4 #3 As part of a water quality survey, you test the water hardness in several randomly selected streams. The results are shown below. Construct a confidence interval for the population variance of and the population standard deviation o. Use a 95% level of confidence. Assume that the population has a normal distribution. n= 23 s= 17 grains per gallon ..... What is the confidence interval for the population variance o? I D (Round to one decimal place as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to one decimal places as needed.) O A. With 95% confidence, it can be said that the population variance is less than OB. O B. With 95% confidence, it can be said that the population variance is between pue O C. With 5% confidence, it can be said that the population variance is greater than O D. With 5% confidence, it can be said that the population variance is between pue Next 5-58 PM P Type here to search 59F Clear ^ PrtSa Delete F10 & %23 Backspace 8. G H N PgUp Alt Alt Ctrl
+ I|
V
MI
2.
As part of a water quality survey, you test the water hardness in several randomly selected streams. The results are shown below. Construct a confidence interval for the population
varjance o and the population standard deviation o. Use a 95% level of confidence. Assume that the population has a normal distribution.
2
n= 23
s=17 grains per gallon
What is the confidence interval for the population standard deviation o?
) (Round to one decimal place as needed.)
Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice.
(Round to one decimal places as needed.)
O A. With 5% confidence, you can say that the population standard deviation is
O B. With 95% confidence, you can say that the population standard deviation is less
between
pue
grains per gallon.
than
grains per gallon.
O C. With 5% confidence, you can say that the population standard deviation is
O D. With 95% confidence, you can say that the population standard deviation is
greater than
grains per gallon.
pue
grains per gallon.
between
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Transcribed Image Text:+ I| V MI 2. As part of a water quality survey, you test the water hardness in several randomly selected streams. The results are shown below. Construct a confidence interval for the population varjance o and the population standard deviation o. Use a 95% level of confidence. Assume that the population has a normal distribution. 2 n= 23 s=17 grains per gallon What is the confidence interval for the population standard deviation o? ) (Round to one decimal place as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to one decimal places as needed.) O A. With 5% confidence, you can say that the population standard deviation is O B. With 95% confidence, you can say that the population standard deviation is less between pue grains per gallon. than grains per gallon. O C. With 5% confidence, you can say that the population standard deviation is O D. With 95% confidence, you can say that the population standard deviation is greater than grains per gallon. pue grains per gallon. between Next P Type here to search 5:59 PM 59°F Clear A O F8 F10 PrtSc Insert Delet F12 Backs 3. 4. 5. 8. G PgUp Home Alt Ctrl
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