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We use the t distribution to construct a confidence interval for the population mean when the...

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 95% confidence level and a sample of 8 observations.   
  b. A 90% confidence level and a sample of 8 observations.   
  c. A 95% confidence level and a sample of 28 observations.   
  d. A 90% confidence level and a sample of 28 observations.
Math   Statistics-And-Probability   
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