Review 9B
AP Statistics
Name:
Directions: Work on these sheets.
Part 1: Multiple Choice. Circle the letter corresponding to the best answer.
1. A study of voting chose 663 registered voters at random shortly after an election. Of these, 72%
said they had
Test 9B
A P Statistics
Name:
Directions: Work on these sheets.
Part 1: Multiple Choice. Circle the letter corresponding to the best answer.
1. A phone-in poll conducted by a newspaper reported that 73% of those who called in liked business
tycoon Donald T
Chapter 9 Significance Tests
Confidence intervals are one of the two most common types of statistical inference. Use a confidence interval when
your goal is to estimate a population parameter. The second common type of inference, called significance tests
Quiz 8.3A AP Statistics Name:
1. Below are the graphs of a standard Normal distribution and a râ€”distribution with 3 degrees of
freedom.
(a) Indicated which graph is which
and explain how you know.
Dotted graph =
Solid graph =
1. (a) Dotted
The parameter is the true proportion of males aged 12 to 17 in the U.S. who play
MMORPGs.
Random: The problem states that an SRS was taken.
Normal:
n ^p =775 10; n ( 1^p )=325 10.
Independence: It seems reasonable to assume that individual observations ar