Question: We use thetdistribution to construct a confidence interval for the population mean when the underlying population standard deviation is not known. Under the assumption that

We use thetdistribution 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, findt₂,df for the following scenarios.UseTable 2.(Round your answers to 3 decimal places.)

	t_/2,df
a. A 95% confidence level and a sample of 16 observations.
b. A 90% confidence level and a sample of 16 observations.
c. A 95% confidence level and a sample of 7 observations.
d. A 90% confidence level and a sample of 7 observations.

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