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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 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 90% confidence level and a sample of 19 observations. | |
| d. | A 95% confidence level and a sample of 19 observations. |
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