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Question 1

The distribution of a sample of the outside diameters of PVC gas pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. About 95 percent of the outside diameters lie between what two amounts?

13.5 and 14.5 inches

13.8 and 14.2 inches

13.0 and 15.0 inches

13.9 and 14.1 inches

Question 2

For quantitative data, the relative frequency for a class is computed as class

Group of answer choices

frequency divided by the class interval.

midpoint divided by the class frequency.

width divided by class interval.

frequency divided by the total frequency.

Question 3

The members of each soccer team wear numbers on the back of their jerseys. What scale of measurement are these numbers considered?

Group of answer choices

Nominal

Ordinal

Interval

Ratio

Question 4

The cost of dinner at Sullivan's for a sample of four customers revealed the following: $86, $67, $86 and $85.

What is the modal net income?

Group of answer choices

$67

$85

$85.5