Please check if the following attached is correct and explain:

Which of the following is a continuous quantitative variable? Select one: O a. Sections of ST370 b. Weight of a person O c. Zip code O d. Number of pets in a houseFor Events A and B, if P(A B) = 0 then Select one: O a. events A and B are mutually exclusive O b. P(B| A) = 0 c. P(A and B) = 0 d. all of the aboveA certain steel bar is measured with a device which has a known precision o = 0.5mm. Suppose we want to estimate the mean 'measurement' with an error at most 0.2mm at the level of significance a = 0.05. What sample size is required? Assume normality. Select one: O a. 28 b. 24 O c. 6 O d. 7 Answer saved e. none of the preceding