The random sample (3,5,6,8,9,11) is selected from a normal population. Construct a 90% confidence interval estimate...

The random sample (3,5,6,8,9,11) is selected from a normal population. Construct a 90% confidence interval estimate for the sample standard deviation.

Solutions

Expert Solution

	Values ( X )
	3	16
	5	4
	6	1
	8	1
	9	4
	11	16
Total	42	42

Mean

Standard deviation

n = 6

Lower Limit =
Upper Limit =
90% Confidence interval is ( 3.7939 , 36.6656 )
( 3.7939 < < 36.6656 )

For sample standard deviation

( 1.9478 < < 6.0552 )

orchestra answered 1 year ago

Next > < Previous

Related Solutions

Determine the sample size n needed to construct a 90% confidence interval to estimate the population...

Determine the sample size n needed to construct a 90% confidence interval to estimate the population mean when sigma equals 67 and the margin of error equals 10. n=???????

Determine the sample size n needed to construct a 90% confidence interval to estimate the population...

Determine the sample size n needed to construct a 90% confidence interval to estimate the population proportion when p over bar equals 0.64 and the margin of error equals 7%. n=???

Use the sample data and confidence level to construct the confidence interval estimate of the population...

Use the sample data and confidence level to construct the confidence interval estimate of the population proportion p. n equals 550 comma x equals 440 comma 95 % confidence nothingless thanpless than nothing (Round to three decimal places as needed.)

Use the sample data and confidence level to construct the confidence interval estimate of the population...

Use the sample data and confidence level to construct the confidence interval estimate of the population proportion p. n equals 500 comma x equals 350 comma 95 % confidence nothingless thanpless than nothing (Round to three decimal places as needed.)

If n=200 and X=70, construct a 90% confidence interval estimate for the population proportion.

If n = 300 and X = 90, construct a 90% confidence interval estimate of the...

If n = 300 and X = 90, construct a 90% confidence interval estimate of the population proportion. (answer) < pie < (answer) Note: the "< " listed above are suppos to be underlined.

In order to construct a confidence interval for the population variance, a random sample of n...

In order to construct a confidence interval for the population variance, a random sample of n observations is drawn from a normal population. Use this information to find χ2α/2,df and χ21- α/2,df under the following scenarios. Use Table 3. (Round your answers to 3 decimal places.) χ2α/2,df and χ21- α/2,df . A 95% confidence level with n = 18. b. A 95% confidence level with n = 30. c. A 99% confidence level with n = 18. d. A 99%...

In order to construct a confidence interval for the population variance, a random sample of n...

In order to construct a confidence interval for the population variance, a random sample of n observations is drawn from a normal population. Use this information to find χ2α/2,df and χ21-α/2,df under the following scenarios. (Round your answers to 3 decimal places. You may find it useful to reference the appropriate table: chi-square table or F table) χ2α/2,df χ21-α/2,df a. A 90% confidence level with n = 20. b. A 90% confidence level with n = 43. c. A 99%...

In order to construct a confidence interval for the population variance, a random sample of n...

In order to construct a confidence interval for the population variance, a random sample of n observations is drawn from a normal population. Use this information to find χ2α/2,df and χ21- α/2,df under the following scenarios. (Round your answers to 3 decimal places. You may find it useful to reference the appropriate table: chi-square table or F table) χ2α/2,df χ21- α/2,df a. A 95% confidence level with n = 18. b. A 95% confidence level with n = 30. c....

Construct a 95% confidence interval to estimate the population proportion with a sample proportion equal to...

Construct a 95% confidence interval to estimate the population proportion with a sample proportion equal to 0.45 and a sample size equal to 120. ----- A 95% confidence interval estimates that the population proportion is between a lower limit of ___ and an upper limit of ___ ????

Subjects