Data Analysis
A study examined how long aircraft air conditioning units operated after being repaired. Here
are the operating times (in hours) for one unit:
32
51
58
63
65
69
90
97
98
100
103
106
117
118
118
120
124
128
129
132
150
152
185
196
225
231
289
a) Make a histogram of these data, using 40 hour wide classes, starting with 0<time < 40, 40
< time < 80,…..
b) Describe the overall shape of the distribution. Is it roughly symmetric, skewed to the right
, or skewed to the left? Are there any outliers?
c) Is the five number summary of the mean and standard deviation a better brief summary
for this distribution? Explain your choice. Calculate the one of these summaries that you
choose.
A study examined how long aircraft air conditioning units operated after being repaired. Here
are the operating times (in hours) for one unit:
32
51
58
63
65
69
90
97
98
100
103
106
117
118
118
120
124
128
129
132
150
152
185
196
225
231
289
a) Make a histogram of these data, using 40 hour wide classes, starting with 0<time < 40, 40
< time < 80,…..
b) Describe the overall shape of the distribution. Is it roughly symmetric, skewed to the right
, or skewed to the left? Are there any outliers?
c) Is the five number summary of the mean and standard deviation a better brief summary
for this distribution? Explain your choice. Calculate the one of these summaries that you
choose.
