Abraham Bahena
Business Statistics 204
Friday 7:30am-10:20am
Chapter 3 Exercises 3-7, 10, 52, 54 pages 92-93 and page 111
Exercises 3-7, 3-10, 3-52, 3-54
3-7. Consider the following data that represent the commute distances for
students who attend Emory University:
3.1
4.7
8.4
11.6
12.1
13
13.4
16.1
17.3
20.8
22.8
24.3
26.2
26.6
26.7
31.2
32.2
35.8
35.8
39.8
(a) Determine the 80th percentile
ⅈ = 𝑃
100(𝑛) → 80𝑡ℎ = 80
100(20) = 16 → 31.2
(b) Determine the numbers that are the 25th and 75th percentiles
ⅈ = 𝑃
100(𝑛) → 25𝑡ℎ = 25
100(20) = 5 → 12.1
ⅈ = 𝑃
100(𝑛) → 75𝑡ℎ = 75
100(20) = 15 → 26.7
(c) Determine a number that qualifies as a median for these data
ⅈ =1
2𝑛 → ⅈ =1
2(20) = 10 → 22
3-10. The following data reflect the tips revived by a random sample of 20
restaurants services in Denver, Colorado during a 4-hour breakfast shift.
$33
$32
$37
$29
$47
