Question: Question 3 We use the t-distribution for the statistical inference of the population mean when the underlying population standard deviation is not known. Under the

Question 3

We use the t-distribution for the statistical inference of the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find the t-value for a 90% confidence interval and a sample of 28 observations.

Fill in the Blank

Showthree (3) digits to the right of the decimal point, for example, 1.000, 1.200, 1.220, 1.222.

The t-value is ________________________

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