Scores on the mathematics part of the SAT exam in a recent year were roughly Normal with mean 515 and standard deviation 114. You choose an SRS of 100 students and average their SAT Math scores. Suppose that you do this many, many times. Which of the following are the mean and standard deviation of the sampling distribution of x̄ ?

Mean = 515/100; SD = 114/√100

Why is it important to check the 10% condition before calculating probabilities involving x̄?

To ensure that the observations in the sample are close to independent.

To reduce the variability of the sampling distribution of x̄

To ensure that the distribution of x̄ is approximately Normal

To ensure that we can generalize the results to a larger population

To ensure that x̄ will be an unbiased estimator of μ.

As students were leaving the cafeteria Dr. O flipped a coin and if it landed on heads he asked if the bought lunch that day. After all the lunches he found 200 of the 350 bought lunch. What condition was not met.

sample size was not large enough

Some data were collected on the weight of a male white laboratory rat for the first 25 weeks after its birth. The linear regression equation is: y = 40x + 100 Which is the best description of the slope for this regression equation in context of the problem?

The slope is 40 grams/week which means the mouse is predicted to gain about 40 grams per week on avg after birth.

The slope of the line of regression is the time since birth of the rate. It demonstrates the predicted weight of a laboratory rate after so many months since birth.

The slope is 40 and it means for every increase in weeks the graph will increase.

The slope is 40, which tells us the rat gains exactly 40 grams every week.

Which of the following best describes a Type I error?

The null is true, but we mistakenly reject it.

The null is false and we reject it.

The null is false, but we fail to reject it.

The null is true but we fail to reject it.

Which of the following best describes a Type II error?

The null is false but we fail to reject it.

The null is true but we mistakenly reject it.

The null is false but we mistakenly reject it.

The null is true but we fail to reject it.

What happens to the shape of a sampling distribution of sample means as n increases?

It becomes narrower and more normal.

It becomes narrower and bimodal.

It becomes wider and skewed right.

It becomes wider and more normal.

A large SRS of people aged 19 to 30 living in the state of Colorado was surveyed to determine which of two MP3 players just developed by a new company was preferred. To which of the following populations can the results of this survey be safely generalized?

Only people aged 19 to 30 living in Colorado

Only people aged 19 to 30 living in Colorado who were in this survey.

Only people 19 to 30 living in the United States

All people living in the United States

A large SRS of people aged 19 to 30 living in the state of Colorado was surveyed to determine which of two MP3 players just developed by a new company was preferred. To which of the following populations can the results of this survey be safely generalized?

Only people aged 19 to 30 living in Colorado

Only people aged 19 to 30 living in Colorado who were in this survey.

Only people 19 to 30 living in the United States

All people living in the United States

What does the symbol represent? $$\sigma$$

standard deviation from a population

standard deviation from a sample

standard deviation of the sampling distribution of sample proportions

standard deviation of the sampling distribution of sample standard deviations

What does the symbol represent?

mean of the sampling distribution of sample proportions

standard deviation of the sampling distribution of sample proportions

What does the symbol represent?

probability of something happening

mean of the sampling distribution of sample proportions

What does the symbol represent?

standard deviation of the sampling distribution of sample proportions

mean of the sampling distribution of sample proportions

standard deviation from a population

What does the symbol represent? $$s$$

standard deviation from a sample

standard deviation of the sampling distribution of sample proportions

standard deviation of the sampling distribution of sample standard deviations

standard deviation from a population

What does the symbol represent? $$\overline{x}$$

mean of the sampling distribution of sample means

What does the symbol represent? $$\mu$$

mean of the sampling distribution of sample means

What does the symbol represent?

probability of something happening

mean of the sampling distribution of sample proportions

Review! $$P\left(A\cap B\right)$$

the probability of event A and B happening

the probability of event B happening given that event A already happened

the probability of event A happening given that event B already happened

the probability of event A or B happening

the probability of event A happening given that event B already happened

the probability of event B happening given that event A already happened

the probability of event A or B happening

the probability of event A and B happening

Review! $$P\left(A\cup B\right)$$

the probability of event A or B happening

the probability of event B happening given that event A already happened

the probability of event A happening given that event B already happened

the probability of event A and B happening

AP Statistics Review

Authored by Suzanne Glass

Mathematics

12th Grade

CCSS covered

Used 3+ times

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38 questions

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the slope of the LSRL from this printout?

0.74

-0.47

1.098

23.59

Tags

CCSS.HSS.ID.C.8

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The table shown is comparing a person's foot length to their height in cm. Calculate the regression equation

yhat = 25.05x + 5.57

yhat = 5.57x + 25.05

yhat = -5.57x + 25.05

yhat = 5.57x - 25.05

Tags

CCSS.HSS.ID.C.8

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which is the best CONTEXTUAL description of the y - intercept for the linear regression equation of the rats: Weight = 100 + 40(Time)?

The y-intercept is 100, which means the rat is predicted to weigh 100 grams at birth.

The y-intercept is 100, which is where the graph crosses the y-axis.

100 is where the data starts on the y-axis.

The y-intercept is 100, which means at a weight of 0, the rat will take 100 seconds.

Tags

CCSS.HSF.LE.B.5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the correlation (r) value?

.209

.457

.13

.361

Tags

CCSS.8.SP.A.3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you calculate a residual?

Actual y MINUS Predicted y-hat

Predicted y-hat MINUS Observed y

Tags

CCSS.HSS.ID.B.6B

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Describe the correlation in the graph shown.

Strong Negative

Strong Positive

Weak Negative

Weak Positive

Tags

CCSS.HSS.ID.B.5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

According to the 1.5 x IQR rule, how many outliers are there in the data set 72, 110, 114, 115, 118, 123, 144, 156?

None

One

Two

Three

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AP Statistics Review

What is the slope of the LSRL from this printout?

The table shown is comparing a person's foot length to their height in cm. Calculate the regression equation

Which is the best CONTEXTUAL description of the y - intercept for the linear regression equation of the rats: Weight = 100 + 40(Time)?

What is the correlation (r) value?

How do you calculate a residual?

Describe the correlation in the graph shown.

According to the 1.5 x IQR rule, how many outliers are there in the data set 72, 110, 114, 115, 118, 123, 144, 156?

The histogram shows the typical travel time to school (self-reported) for 50 high school students. Which of the following statements is true about the mean and median of this distribution?

Which class has the higher test score median?

Suppose we roll a fair die four times. The probability that a 6 occurs on exactly one of the rolls is

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