Answered: a) Make a stem-and-leaf display for the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An annual marathon covers a route that has a distance of approximately 26 miles. Winning times for this marathon are all over 2 hours. The following data are the minutes over 2 hours for the winning male runners over two periods of 20 years each.

(a) Make a stem-and-leaf display for the minutes over 2 hours of the winning times for the earlier period. Use two lines per stem. (Use the tens digit as the stem and the ones digit as the leaf. Enter NONE in any unused answer blanks.

(b) Make a stem-and-leaf display for the minutes over 2 hours of the winning times for the recent period. Use two lines per stem. (Use the tens digit as the stem and the ones digit as the leaf. Enter NONE in any unused answer blanks.)

An annual marathon covers a route that has a distance of approximately 26 miles. Winning times for this marathon are all over 2 hours. The following data are the minutes over 2 hours for the winning male runners over
two periods of 20 years each.
Earlier Period
15 19
13
10 16
7
17
14
16
23 14 13 20
18 23 22
10 16 13
Recent Period
7 10
9 14
7
11
8
10
7
14
7 9
7
9
9
8
9
8
(a) Make a stem-and-leaf display for the minutes over 2 hours of the winning times for the earlier period. Use two lines per stem. (Use the tens digit as the stem and the ones digit as the leaf. Enter NONE in any
unused answer blanks. For more details, view How to Split a Stem.)
Minutes Beyond 2 Hours
Earlier Period
(b) Make a stem-and-leaf display for the minutes over 2 hours of the winning times for the recent period. Use two lines per stem. (Use the tens digit as the stem and the ones digit as the leaf. Enter NONE in any
unused answer blanks.)
Minutes Beyond 2 Hours
Recent Period
(c) Compare the two distributions. How many times under 15 minutes are in each distribution?
earlier period
times
recent period
times

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