Right or wrong. Only one correct answer per part.

A.

the output was obtained by fitting the bidirectional analysis of variance to the data with the response variable y is scaled, variable x1 can be A, B or C and variable x2 can be YES or NO. (See image 1.)

When x1 = B and x2 = YES, the estimate of the population mean (= expected value) of the variable y is

i 5

ii. 6

iii. 0

B.

the point estimate for the population mean (= expectation value) of the variable y was 15. The lower limit of the 95% confidence interval was 10 and the upper limit was 20.

i. The population mean of the variable y is 15.

ii. The population mean of the variable y is between (10, 20).

iii. The population mean of the variable y is quite certainly between (10, 20).

C.

Consider random variables X and Y, for which the point probability function of the common distribution is shown

below. Which of the following statements is not true? (See image 2.)

Estimate Std. Error t value Pr(>|t) (Intercept) 5.00 0. 28931 17.420