AP Statistics Chapter 1 review “Exploring Data”. From which statistic can you recover the total...

AP Statistics

Chapter 1 review

“Exploring Data”

From which statistic can you recover the total value of the data set, if you know how many entries there are?

1. Range

2. Median

3. Variance

4. Mean

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If a group of high school biology students were given an anatomy exam developed for medical school students, it is likely that the

_____ would be larger than the _____.

1. mode; median

2. mode; mean

3. median; mean

4. mean;median

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Which of the following is not affected by the actual magnitude of every value in the data

set?

1. Arithmetic mean

2. Median

3. Range

4. Standard deviation

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If 400 test scores are distributed with a mean of 150 and s = 9, the variance of the

test scores is:

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1. 2.67

2. 3

3. 44.44

4. 81

A set of 10 scores has a mean of 50 and s = 8. If you add 2 points to every score, the new standard deviation will be:

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1. 6

2. 8

3. 10

4. Cannot be determined

A set of 10 scores has a mean of 50 and s = 8. If you double each score, the new “s” will be:

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1. 4

2. 8

3. 16

4. 64

Which of the following concepts is out of place with the other three?

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1. Mean

2. Standard deviation

3. Range

4. IQR

If there are 20 entries in an ordered list of data, the median will be the 10th entry.

1. True

2. False

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Which numerical summary is better for skewed data?

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1. 5-number summary

2. Mean, standard deviation

3. Center, spread, shape

4. 1.5*IQR

“Arithmetic mean” is to “central tendency” as “standard deviation” is to _________.

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1. Average

2. Variability

3. Median

4. Range

Two classes took the same exam. Class M’s scores showed s = 6.4 and class Q’s s = 4.0. Which is true?

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1. Class M had a higher average

2. Variance of class Q is 2

3. Class Q is more alike than class M

4. Class M is 16 times more dispersed

Given scores: 2, 6, 4, 3, 5. How far, on average, do the scores deviate from the

mean?

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1. 1.2 points

2. 4.0 points

3. 0 points

4. 6.0 points