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Multiple Choice Quiz
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Chapter 1 Quiz - Introduction and Descriptive Statistics



1

A distribution that is relatively flat and wide is said to be:
A)skewed to the right
B)symmetric
C)platykurtic
D)kurtosis
E)none of the above
2

The following are the grades a professor gave on the first test in a statistics class: 52, 90, 88, 61, 75, 82, 75, 83, 88, and 86.

What was the median score on this test?

A)82
B)82.5
C)78.5
D)88
E)75
3

A clothes store manager has sales data of trouser sizes for the last month's sales. Which measure of central tendency should the manager use, if the manager is interested in the most sellable size?
A)mean
B)median
C)mode
D)standard deviation
E)interquartile range
4

The mean weight of three gemstones is 20 grams. The weights of two of the stones are 15 grams and 17 grams. What is the weight of the third stone?
A)16 grams
B)10 grams
C)28 grams
D)14 grams
E)not enough information to determine the weight of the third stone
5

A market research company has collected data on the price of a particular brand of soap in several different locations. The prices are as follows: $0.89, 0.95, 1.25, 1.36, 1.49, 1.65, 1.79, 1.89, 1.99. What are the upper and lower quartiles of soap prices for this brand?
A)1.72, 1.17
B)1.84, 1.17
C)1.72, 1.10
D)2.21, 0.74
E)1.84, 1.10
6

In a survey conducted among the employees of a local bank, it is found that the following are the number of children each employee has: 1, 0, 2, 2, 0, 1, 0, 1, 4, 3, 6, 4, 2, 0, 1, and 3. What is the mean number of children for these employees?
A)2.5
B)1.875
C)1.5
D)2.0
E)6.0
7

Several friends go to a casino and do some gambling. The following are the profits each of these friends make: $120, -$230, $670, -$1020, $250, -$430, and -$60. What is the average profit of this group?
A)$100
B)-$100
C)-$1020
D)$397
E)-$397
8

Find the variance of the following set of values: 2, 5, 8, 6, and 1.
A)2.88
B)4.4
C)8.3
D)7
E)5
9

A measure of the degree of asymmetry of a frequency distribution is called?
A)kurtosis
B)skewness
C)coefficient of variation
D)standard deviation
E)ogive
10

The graph of a cumulative frequency distribution is called?
A)ogive
B)pie chart
C)frequency polygon
D)histogram
E)bar chart
11

What measure of central tendency is most sensitive to skewness?
A)Mode
B)Median
C)Mean
D)They are all about the same
E)Median and Mean
12

The average amount of time required to fill orders at a drive-up window has been observed to be 120 seconds, with a standard deviation of 10 seconds. Assuming that the required order-fill time follows a symmetric, bell-shaped distribution, which of the following statements is correct regarding a random sample of 1,000 observations?
A)We would expect to see approximately 680 of the order fill-times falling in the interval from 110 seconds to 120 seconds
B)We would expect to see approximately 955 of the order fill-times falling in the interval from 100 seconds to 140 seconds
C)We would expect to see approximately 27 orders with required fill-times of less than 90 seconds
D)We would expect to see approximately 27 orders with required fill-times in excess of 150 seconds
E)All of the above are correct





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