Math 227 - Statistics » Spring 2023 » 03P Measures of Center & Variation

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Question #1
The weights (in pounds) of six dogs are listed below. Find the mean weight. Round your answer to one more decimal place than is present in the original data values. 46, 110, 33, 37, 81, 61
A.   59.8
B.   62.5
C.   60.8
D.   61.3
Question #2
Andrew asked eight of his friends how many cousins they had. The results are listed below. Find the mean number of cousins. Round your answer to one more decimal place than is present in the original data values. 4, 9, 7, 13, 12, 8, 3, 13
A.   8.6
B.   7.4
C.   6.7
D.   8.2
Question #3
Listed below are the amounts of time (in months) that the employees of a restaurant have been working at the restaurant. Find the median. Round your answer to one more decimal place than is present in the original data values. 10, 141, 82, 95, 2, 17, 13, 60, 128, 9, 14, 21
A.   15
B.   23
C.   19
D.   35
Question #4
The amount of time (in hours) that Sam studied for an exam on each of the last five days is given below. Find the median study time. Round your answer to one more decimal place than is present in the original data values. 0.6, 9.1, 5.4, 7.9, 10
A.   9.4
B.   5.8
C.   7.9
D.   8.3
Question #5
Find the mode(s) for the given sample data. (If there are more than one, enter the largest value for credit. If there is no mode, enter 0 for credit.) 10, 4, 8, 9, 2, 7, 8
A.   6
B.   7
C.   8
D.   5
Question #6
Find the mode(s) for the given sample data. (If there are more than one, enter the largest value for credit. If there is no mode, enter 0 for credit.) 11, 24, 26, 43, 51, 72, 88, 97
A.   24
B.   43
C.   0
D.   26
Question #7
The local Tupperware dealers earned these commissions last month. What was the standard deviation of the commission earned? Round your answer to the nearest cent. 340.05, 373.43, 485.7, 165.45, 321.96, 233.16, 251.86,439.39, 355.89, 120.28, 422.56, 246.4
A.   165.75
B.   205.76
C.   111.83
D.   145.13
Question #8
The amount of time (in hours) that Sam studied for an exam on each of the last five days is given below. Find the standard deviation of the study time. Round your answer to one more decimal place than is present in the original data values. 3.2, 2.5, 0.2, 9.2, 5
A.   3.37
B.   5.12
C.   6.71
D.   2.5
Question #9
The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency distribution below summarizes the results. Find the mean of the frequency distribution. Round your answer to one more decimal place than is present in the original data values. Waiting Time (minutes) / Number of Customers 0-3 / 2 4-7 / 12 8-11 / 11 12-15 / 12 16-19 / 3 20-23 / 8
A.   17.1
B.   19.2
C.   11.7
D.   15.6
Question #10
The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency distribution below summarizes the results. Find the standard deviation of the frequency distribution. Round your answer to one more decimal place than is present in the original data values. Waiting Time (minutes) / Number of Customers 0-3 / 8 4-7 / 1 8-11 / 7 12-15 / 4 16-19 / 12 20-23 / 2
A.   4.2
B.   8.4
C.   6.8
D.   12.6

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