from chi square table ; critical values are :
a)9.390 ; 28.869
b)32.268 ; 64.001
c)8.231 ; 31.526
d) 29.956 ; 67.821
Exercise 11-3 Algo In order to construct a confidence interval for the population varian population. Use...
Exercise 11-3 Algo 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 χ2a/2, df and X21-a/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) a/2,df 1-a/2, d a. b. C. d. A 90% confidence level with n 17. A 90% confidence level...
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 χ2a/2, df and χ21 L 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 Ftable) a/2,d.f X"1-a/2,df a. A 90% confidence level with n- 17. b. A 90% confidence level with n- 28. C. A...
We use the t distribution to construct a confidence interval for the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find tα/2,df for the following scenarios. (You may find it useful to reference the t table. Round your answers to 3 decimal places.) tα/2,df a. A 90% confidence level and a sample of 25 observations. b. A 95% confidence level and a sample of 25 observations. c. A...
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 = 25. b. A 90% confidence level with n = 35. c. A 99%...
We use the t distribution to construct a confidence interval for the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find ta/2,df for the following scenarios. (You may find it useful to reference the table. Round your answers to 3 decimal places.) ta/2,df a. A 95% confidence level and a sample of 14 observations. b. A 99% confidence level and a sample of 14 observations. A 95% confidence...
We use the t distribution to construct a confidence interval for the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find ta/2, df for the following scenarios. (You may find it useful to reference the t table. Round your answers to 3 decimal places.) ta/2,df a. b. 2.228 A 90% confidence level and a sample of 11 observations. A 95% confidence level and a sample of 11 observations....
We use the t distribution to construct a confidence interval for the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find tα/2,df for the following scenarios. (You may find it useful to reference the t table. Round your answers to 3 decimal places.) tα/2,df a. A 90% confidence level and a sample of 25 observations. b. A 95% confidence level and a sample of 25 observations.
We use the t distribution to construct a confidence interval for the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find ta/2, df for the following scenarios. (You may find It useful to reference the t table. Round your answers to 3 decimal places.) ta/2,df a. A 95 confidence level and a sample of 23 obeervations. b. A 99% confidence level and a sample of 23 observations. e....
We use the t distribution to construct a confidence interval for the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find tα/2,df for the following scenarios. (You may find it useful to reference the t table. Round your answers to 3 decimal places.) a. A 90% confidence level and a sample of 13 observations. b. A 95% confidence level and a sample of 13 observations. c. A 90%...
We use the t distribution to construct a confidence interval for the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find t??2,df for the following scenarios. Use Table 2. (Round your answers to 3 decimal places.) t?/2,df a. A 90% confidence level and a sample of 21 observations. b. A 95% confidence level and a sample of 21 observations. c. A 90% confidence level and a...