Measures of Center and Spread

Question 1

Find the quartiles for these data values:5, 7, 7, 8, 10, 11, 12, 15, 17.

Revolt · Accepted Answer

Q1 = 7, Q2 = 10, Q3 = 13.5

Question 2

Compare the quantity in column A with the quantity in column B. Choose the best answer.73, 56, 88, 94, 100, 87, 92, 100, 78

Revolt · Accepted Answer

The two quantities are equal.

Question 3

The interquartile range (IQR) is defined as the difference between the first and third quartiles (Q3 − Q1). What feature of the box-and-whisker plot does the IQR describe?

Revolt · Accepted Answer

the length of the box of the box-and-whisker plot

Question 4

Suppose you received these grades on your last five quizzes: 16, 17, 18, 19, and 20. If you get 20's on the next three quizzes, which of the following would change? I. Q1 II. Q2 III. Q3 IV. minimum V. maximum

Revolt · Accepted Answer

I, II, and III

Question 5

Find the value of Q1 for these values:2, 4, 6, 8, 10, 12, 14.

Revolt · Accepted Answer

4

Measures of Center and Spread Answers

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