solution steps no.18 In order to predict with 90% confidence the expected value

Question

solution steps no.18 In order to predict with 90% confidence the expected value of y for a given value of x in a simple linear regression problem, a random sample of 10 observations is taken. Which of the following t-table values listed below would be used? a. 2.228 b. 2.306 c. 1.860 d. 1.812 A recent study of 15 shoppers showed that the correlation between the time spent in the store and the dollars spent was 0.235. Using a significance level equal to 0.05, which of the following is true? a. The null hypothesis that the population mean is equal to zero should be rejected and we should conclude that the true correlation is not equal to zero

Explanation / Answer

Here, the test stastic follows t distribution with n-2 i.e.8 degrees of freedom.

therefore, at 0.10 LOS and 8 degrees of freedom the table value of t is 1.860.

Therefore, the answer is option C,1.860.

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