- Description
QNT 275 Week 2 Practice Set
Chapter 03, Section 3.1, Problem 009
Correct.
The following data set belongs to a population:
4−220−1015127
Calculate the mean, median, and mode.
Round your answers to two decimal places if it is necessary.
Mean =
Median =
Mode =
Chapter 03, Section 3.2, Problem 033
Correct.
The following data give the prices of seven textbooks randomly selected from a university bookstore.
$85 $173 $105 $122 $51 $156 $141
- Find the mean for these data. Calculate the deviations of the data values from the mean. Is the sum of these deviations zero?
Mean = $
Deviation from the mean for $173 = $
Sum of these deviations = $
- Calculate the range, variance, and standard deviation. [Round your answers to 2 decimal places.]
Range = $
Variance =
Standard deviation = $
Chapter 03, Section 3.4, Problem 063
Your answer is correct.
The one-way commuting times from home to work for all employees working at a large company have a bell-shaped curve with a mean of 32 minutes and a standard deviation of 9 minutes. Using the empirical rule, find the approximate percentages of the employees at this company who have one-way commuting times in the following intervals.
- 5 to 59 minutes
%
- 23 to 41 minutes
%
- 14 to 50 minutes
%
Chapter 03, Section 3.5, Problem 069a
Correct.
The following data give the speeds of 13 cars, measured by radar, traveling on I-84.
73 75 69 68 78 69 74
77 72 83 63 77 71
Find the values of the three quartiles and the interquartile range.
Q1=
Q2=
Q3=
IQR= 8
Chapter 03, Section 3.6, Problem 077
Your answer is correct.
The following data give the 2015 bonuses (in thousands of dollars) of 15 randomly selected Wall Street managers.
107 122 163 95 48 347 75 273
60 786 127 203 402 239 71
Prepare a box-and-whisker plot.