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Multiple Choice



 This activity contains 18 questions.

Question 1.
Calculate the median value of the following eight numbers: 14, 34, 50, 10, 24, 11, 32, 20.

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Question 2.
Calculate the standard deviation of the following sample of size four: 3, 4, 7, 10.

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Question 3.
The least squares method minimizes which of the following?

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Question 4.
If the sample correlation coefficient rxy is equal to -1.00, then

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Question 5.
Calculate the interquartile range of the following 11 numbers: 14, 34, 50, 10, 24, 11, 32, 20, 9, 51, 7.

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Question 6.
The strength of the linear relationship between two numerical variables may be measured by the

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Question 7.
In a simple linear regression problem, rxy and b1

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Question 8.
Calculate the covariance of the following sample of four (x, y) pairs: (1, 4), (2, 9), (4, 6), and (5, 9).

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Question 9.


Referring to Table 3-1, what is the estimated slope parameter for the candy bar price and sales data?

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Question 10.


Referring to Table 3-1, if the price of the candy bar is set at $2, the predicted sales will be ________.

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Question 11.
Which of the following statements about the median is NOT true?

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Question 12.
In a perfectly symmetrical distribution

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Question 13.
When extreme values are present in a set of data, which of the following descriptive summary measures are most appropriate?

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Question 14.
Calculate the correlation coefficient of the following sample of four (x, y) pairs: (1, 4), (2, 9), (4, 6), and (5, 9).

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Question 15.
At a highway checkpoint, the average speed of a passing car was measured at 45 miles per hour with a standard deviation of 4 miles per hour. According to Chebychev's Theorem, what percentage of cars would you expect to be traveling between 33 and 57 miles per hour?

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Question 16.


Referring to Table 2-3, the mean carbohydrates in this sample is ________ grams.

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Question 17.


Referring to Table 2-3, the variance of the carbohydrate amounts is ________ (grams squared).

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Question 18.
Which of the following is not part of the five-number summary?

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