Question 61pts

Which meteorologist is more accurate on the days on which it did not rain?

Group of answer choices

The ABC meteorologist is more accurate on the no-rain days.

The NBC meteorologist is more accurate on the no-rain days.

The ABC and NBC meteorologists are equally accurate on the no-rain days.

Cannot begin to tell from information given

Question 71pts

Which meteorologist provides more noisy forecasts of the probability of rain, overall? (Hint: Recall that noise concerns the amount of non-systematic (or random) variation in a distribution of numbers).

Group of answer choices

ABC provides more noisy forecasts of the probability of rain, overall.

NBC provides more noisy forecasts of the probability of rain, overall.

ABC and NBC provide equally noisy forecasts of the probability of rain, overall.

Cannot tell who provides more noisy forecasts, overall, from the information given.

Question 81pts

Yoon Ju has a bright idea to explore the correlation between ABC meteorologist's probability assessments of rain and whether or not it actually rained to the same correlation for NBC's meteorologist's probability assessments of rain. What is the linear correlation between ABC's forecasts of rain and whether or not it rains?

Group of answer choices

+0.02

+0.51

+0.78

+0.95