Question

**The table is bottom of these questions a) What are the quartiles? b) What are the...

**The table is bottom of these questions

a) What are the quartiles?

b) What are the deciles?

c) Where would 150 minutes rank as a percentile?

d) Where would 160 minutes rank as percentile?

Times
175.21
175.18
176.6
141.83
174.09
158.53
140.57
172.2
152.03
177.64
171.46
141.97
158.39
143.76
165.63
173.9
185.41
141.18
175.58
173.18
183.97
152.07
146.59
142.33
164.87
165.06
143.44
191.42
147.78
143.96
171.33
169.49
145.11
176.29
164.17
146.67
192.84
144.69
140.95
158.75
145.91
170.43
219.96
141.06
173.24
176.98
144.41
153.34
156.9
140.1
150.51
165.08
201.79
178.38
160.88
Math   Statistics-And-Probability   
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Homework Answers

Answer #1

The whole question can be solved easily using excel

First step is to sort the numbers in ascending order

1. use "quartile.exec(array,1or2or3) in order to determine first, second or third quartile

first quartile second quartile (median) third quartile
145.11 164.17 175.18

2. use "PERCENTILE.EXC(array, 0.1)" to find the first decile and so on until the 9th decile

141.57 1st decile
144.05 2nd decile
146.654 3rd decile
154.764 4th decile
164.17 5th decile
170.054 6th decile
173.372 7th decile
176.148 8th decile
184.546 9th decile

3. use "=PERCENTRANK.EXC(array,150)" to find the percentile of 150 = 0.335 = 33.5th percentile

4. use "=PERCENTRANK.EXC(array,160)" to find the percentile of 160 = 0.474 = 47.4th percentile

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