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This activity contains 15 questions.

Question 1.
A statistician summed the observed numerical values of a variable and then divided the total by the number of observations. What measure of central tendency is being found?

End of Question 1

Question 2.
Give the median for the temperatures recorded over the course of a day during a record high. ch03-02a.gif

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Question 3.
If a data set is arranged in numerical order, it is called a(n) __________.

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Question 4.
A ____________ distribution is one in which the values are predominantly located in the center of the distribution with relatively few values falling in the tails.

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Question 5.
The property which concerns the relative concentration of values in the center of the distribution as compared to the tails is called __________.

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Question 6.
What measure of central tendency is affected by extreme values in a set of data?

End of Question 6

Question 7.
Distributions with two modes are referred to as __________.

End of Question 7

Question 8.
Calculate the midrange value for the following data set. ch03-08a.gif

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Question 9.
The first quartile for an ordered data set is the value such that ______ percent of the observations are smaller and ________ percent are larger.

End of Question 9

Question 10.
Determine the value of the third quartile for the following data set.


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Question 11.
The amount of variation or spread of data is called the __________ of the data.

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Question 12.
The __________ measures how values spread out or disperse around the mean.

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Question 13.
Which of the following statements can never be true for a data set?

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Question 14.
For the following data set, the range is ________ and the sample standard deviation is ______.


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Question 15.
A distribution in which the upper half is a mirror image of the lower half is defined as __________.

End of Question 15

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