1) A market research firm wants to select a large sample to estimate the proportion of Canadians who use domestic products.

The firm finds that a 95% confidence interval for the proportion of Canadians who use domestic products is (0.65, 0.75). How large is this sample?

Group of answer choices

A) 900

B) 1068

C) 323

D) 1320

E) 750

2) Suppose that random variableXfollows a normal distribution with mean 20 and standard deviation 10.

Let Y=102X. If P(kY<30)=0.4, the value of k is closest to

Group of answer choices

A) -25

B) -19

C) -23

D) -17

E) -21