AP Stat Test End of Semester Part 1

Which of the following is categorical data?

• 1. The birth weight of anteaters

• 1. The lengths of anteaters

• 1. The different types of anteaters

• 1. The top speed of anteaters

• 1. The prices of anteaters

Since the distribution for housing prices is skewed to the right, which measure of center should you use?

• 1. Mean

• 1. Median

• 1. Mode

• 1. Outlier

• None

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CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

Which of the following can outliers affect significantly? (Select three answers that apply)

• Mean

• Median

• Standard Deviation

• Range

• IQR

Using the Empirical rule, you can assume that what percent of the normal distribution is OUTSIDE two standard deviations of the mean in both directions?

• 1. 0.3%

• 1. 50%

• 1. 5%

• 1. 95%

• 1. Can’t be Determined

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CCSS.HSS.ID.A.4

A population of bolts has a mean thickness of 20 millimeters and a standard deviation of 0.01.

 

Give the minimum and maximum thickness that includes 68% of the population of bolts.

• 1. 20.00 to 20.02 ml

• 1. 19.00 to 20.00 ml

• 1. 19.98 to 20.02 ml

• 1. 19.99 to 20.01  ml

• 1. 19.97 to 20.03 ml

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CCSS.HSS.ID.A.4

Population H is a group of women with normally distributed heights and has a mean of 66 inches and standard deviation of 2.5 inches.

What is the height, to the nearest tenth, of the 70th percentile?

• 1. 67.3 inches

• 1. 67.0 inches

• 1. 64.7 inches

• 1. 66.0 inches

• 1. 63.0 inches

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CCSS.HSS.ID.A.4

The following regression equation represents the effect of streetlights per block (x), on crimes per month (y):  y=2.4-0.2x

 

How many crimes per month are predicted when there are 7 streetlights on a block?

• 3.8

• 1.7

• 16.6

• -11.6

• 1.0

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CCSS.HSF.LE.B.5

The following regression equation represents the effect of streetlights per block (x), on crimes per month (y):  y=2.4-0.2x

If a block in a certain town has 10 streetlights and 1 crime a month calculate the residual.

• -0.6

• 0.6

• -0.4

• 0.4

• -1.2

Tags

CCSS.HSS.ID.B.6B

The following regression equation represents the effect of streetlights per block (x), on crimes per month (y):  y=2.4-0.2x

Which of the following is the correct interpretation of the slope?

• 1. The effect of the crime rate on streetlights is given by the coefficient of -0.2.

• 1. For every additional streetlight per block, the crimes per month go up by 2.4

• 1. For every additional streetlight per block, the crimes per month decrease by 0.2

• 1. For every additional crime per month, the number of streetlights go down by 0.2

• 1. Every additional streetlight per block is associated with 0.2 more crimes a month, on average

Tags

CCSS.8.SP.A.3

Use the following data set: { (8, 4, (4, 3), (7, 3), and (5, 2)}

Calculate the least square regression line.

• 1. Y = 0.3 + 1.2x

• 1. Y = -0.02 + 0.9x

• 1. Y = 1.5 + 1.5x

• 1. Y = 4.8 - 3x

• 1. Y = 1.2 + 0.3x

Tags

CCSS.HSS.ID.C.8