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BUSA320 : Statistics for Decision-Making
Textbook : BSTAT 2nd with Review Cards+ Aplia
Publisher: Cengage Learning
1) Pets Survey
Families were asked how many pets they owned. Their responses are summarized in the following table.
Number of Pets
a) How many families are represented in this survey?
b) Across all families, how many total pets did they own?
c)What proportion of families owned 3 pets?
2) Hours Worked per Week
The following data represent the hours worked per week of a sample of 25 employees from a government department: 31, 43, 56, 23, 49, 42, 33, 61, 44, 28, 48, 38, 44, 35, 40, 64, 52, 42, 47, 39, 53, 27, 36, 35, and 20.
a) Construct a stem and leaf display for the hours.
b) Find the median hours.
c) Compute the sample mean hours.
d) Find the modal hours.
e) Compare the mean and median hours for these employees and use them to discuss the shape of the distribution.
3) A basketball player has the following points for seven games: 20, 25, 32, 18, 19, 22, and 30. Compute the following measures of variability.
Coefficient of correlation
4) The frequency distribution representing the number of frequent flier miles accumulated by employees at Brumley Statistical Consulting Company is listed below.
Lead Time (days)
0 up to 5
5 up to 10
10 up to 15
15 up to 20
20 up to 25
a) How many orders were filled in less than 10 days?
b) In less than 15 days?
c) About 60% of the orders were filled in less than how many days?
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