In: Statistics and Probability
Professor Moore, who lives a many miles outside a college town, records the time he takes to drive to the college each morning. Below are the times (in minutes) for 22 consecutive weekdays. The data are contained in the gray columns in the following table and have been ordered from smallest to largest.
Observation |
Driving Time (min) |
Observation |
Driving Time (min) |
1 |
52 |
12 |
62.7 |
2 |
57.9 |
13 |
63.7 |
3 |
58.2 |
14 |
64.9 |
4 |
59 |
15 |
65.8 |
5 |
59.2 |
16 |
66.6 |
6 |
59.3 |
17 |
67.8 |
7 |
59.6 |
18 |
69.3 |
8 |
59.8 |
19 |
70 |
9 |
60.5 |
20 |
73.7 |
10 |
61 |
21 |
81.5 |
11 |
61.1 |
22 |
93.8 |
A) Create a frequency table. Starting point and bin size is your choice.
B) What is the
1) median,
2) First quartile
3) Third quartile
4) Interquartile range
C) Use the interquartile range (IQR) to calculate if there are any outliers.