Question: In order to predict with 80% confidence, the expected value of y for a given value of x in a simple linear regression problem, a

In order to predict with 80% confidence, the expected value of y for a given value of x in a simple linear regression problem, a random sample of 15 observations is taken. Which of the following t-table values listed below would be used and why?

a.1.350

b.1.771

c.2.160

d.2.650

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