(3) Which of the following statements is true?

the low right corner is influential for a least-squares line

(6) What is the mean and standard deviation of the number of 0s?

Mean= 4 standard deviation= 1.90

(6) What makes a geometric setting different from a binomial setting?

There is not a fixed number of trials

(4) When we take a census, we attempt to collect data from

every individual in the population.

5 In bridge a probability of each 4 players being dealt exactly 1 ace is about 0.11. This means

% of deals each player has 1 ace will be close to 11%

(2) 1000 kids take a test. If Pete has a score of 63, and is 73rd percentile. This means that

Pete did better than about 73% of the test takers.

3 Interpret: "Evidence proves a correlation between # of student's activities and a gpa near 0"

there is no linear relationship

(7) A statistic is an unbiased estimator of a parameter when: In many statistics the values of

the values of stat centers at the parameter

(2) All are true about a Density Curve except

it is a good description of precise data

(7) Increasing the sample size of an opinion poll will reduce the

Variability of the estimate made from data collected by poll

Toss a coin 10,000 times to understand the laws of probability. Which ofthe following are true?

It is likely that you will get about 50% heads

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AP Stats Midterm Review

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Ashley Bauer and Katie Parchesky

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Questions 15

Answers

1
(3) Which of the following statements is true?
the low right corner is influential for a least-squares line
The observation (4.5, 6.0) is an outlier.
The correlation for these data is r = 0.99.
there is negative association for $ spent on alcohol&tobacco
2
(4)The first three students in your sample have labels:
400,769,335
929,400,769
955, 929,400
559,294,007
3
(6) What is the mean and standard deviation of the number of 0s?
Mean= 4 standard deviation= 1.90
Mean= 4 standard deviation= 0.05
Mean= 0.1 standard deviation= 0.1
Mean= 0.1 standard deviation=0.05
4
(6) What makes a geometric setting different from a binomial setting?
The trials are not independent
There are three possible outcomes
There is not the same probability of success
There is not a fixed number of trials
5
(4) When we take a census, we attempt to collect data from
a stratified random sample.
every individual in the population.
a voluntary response sample.
a convenience sample.
6
(1) The percent of females among the respondents was (refer to pic)
none of these
about 54%
about 28%
about 65%
7
5 In bridge a probability of each 4 players being dealt exactly 1 ace is about 0.11. This means
Every 100 deals, each player has 1 ace exactly 11 times
% of deals each player has 1 ace will be close to 11%
the avg # of aces in a hand will be close to .11
In 1 million deals, player will have 1 ace for every 110,000
8
(2) 1000 kids take a test. If Pete has a score of 63, and is 73rd percentile. This means that
Pete did worse than about 73% of the test takers.
Pete did better than about 63% of the test takers.
Pete did better than about 73% of the test takers.
Pete did worse than about 63% of the test takers.
9
3 Interpret: "Evidence proves a correlation between # of student's activities and a gpa near 0"
there is no linear relationship
active students tend to be students with poor grades
kids w/ good grades aren't involved in a lot of activities
involvement in many activities & good grades go hand in hand
10
(1) what percent of females thought they would be married in the next ten years? (pic)
about 45%
about 16%
about 30%
about 54%
11
(7) A statistic is an unbiased estimator of a parameter when: In many statistics the values of
the statistic is equal to the value of the parameter
the statistic are close to the value of the parameter
the values of stat centers at the parameter
the distribution of the stat has a shape that is approx norm
12
(2) All are true about a Density Curve except
no set of real data is exactly described
it has area exactly 1 underneath
it is a good description of precise data
it is always on or above the horizontal axis
13
Who was the first Disney princess
Aurora
Cinderella
Snow White
Belle
14
(7) Increasing the sample size of an opinion poll will reduce the
Effect of nonresponse on the poll
Variability of opinions in the sample
Variability of the estimate made from data collected by poll
Bias of the estimates made from the data collected from poll
15
Toss a coin 10,000 times to understand the laws of probability. Which ofthe following are true?
The fraction of tosses resulting in heads should be 1/2
When its 15 tails in a row, its more likely the next's heads
It is unlikely to get more than 5000 heads
It is likely that you will get about 50% heads

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