Question

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 level and a sample 26 observations. d. A 99% confidence level and a sample of 26 observations. C.

Answer 1

From the given information,

By using calculator,

The required correct answers are,

a. t= 2.160

b. t= 3.012

c. t= 2.060

d. t= 2.787

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