(b) Use the cumulative relative frequency plot constructed in part (a) to answer the following questions. (i) Approximately what proportion of commute times were less than 50 min? (Round your answer to two decimal places.) p=94 (ii) Approximately what proportion of commute times were greater than 22 min? (Round your answer to two decimal places.) P = 40 (iii) What is the approximate commute time value that separates the shortest 50% of commute times from the longest 50%? (Round your answer to the nearest whole number min
(b) Use the cumulative relative frequency plot constructed in part (a) to answer the following questions. (i) Approximately what proportion of commute times were less than 50 min? (Round your answer to two decimal places.) p=94 (ii) Approximately what proportion of commute times were greater than 22 min? (Round your answer to two decimal places.) P = 40 (iii) What is the approximate commute time value that separates the shortest 50% of commute times from the longest 50%? (Round your answer to the nearest whole number min
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.1: Stem-and-leaf Plots And Histograms
Problem 12E
Related questions
Question
please help these answers are wrong and 0.92, 0.27, and 15 are not correct either
Transcribed Image Text:Census data for a certain county were used to construct the following frequency distribution for commute time (in minutes) of working adults.
Commute Time
0 to <5
5 to 10
10 to 15
15 to <20
20 to <25
25 to <30
30 to <35
35 to <40
40 to <45
45 to <60
60 to <90
90 to <120
0 to <5
5 to <10
10 to 15
15 to <20
20 to <25
25 to <30
30 to <35
35 to <40
40 to <45
45 to <60
Relative Frequency
60 to <90
0.0511
(a) Fill in the cumulative relative frequencies in the table given below.
90 to <120
0.1812
Commute Time Cumulative Relative Frequency
0.1972
0.1532
0.1371
0.0591
0.1031
0.0190
0.0190
0.0390
0.0200
0.0210
0.0511
0.2323
0.4295
0.5827
0.7198
0.7789
0.882
0.901
0.92
0.959
0.979
1
Transcribed Image Text:Construct a cumulative relative frequency plot.
1.0
0.8
0.6
LLNE
0.4
0.2
0.0
100 120
0
1.0
0.8
0.6
0.4
0.2
0.0
0 20
40
60
80 100 120
Commute Time
0.8
0.6
0.4
0.2
min
0.0
0 20
40
60
80
Commute Time
(b) Use the cumulative relative frequency plot constructed in part (a) to answer the following questions.
20
40
60
(i) Approximately what proportion of commute times were less than 50 min? (Round your answer to two decimal places.)
p = 94
Commute Time
(ii) Approximately what proportion of commute times were greater than 22 min? (Round your answer to two decimal places.)
P = 40
Р
80
100 120
G
1.0
0.8
0.6
0.4
0.2
0.0
0
20
40
60
80
Commute Time
(iii) What is the approximate commute time value that separates the shortest 50% of commute times from the longest 50%? (Round your answer to the nearest whole number.)
P = 19
100
120
6
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