Answered: ONLY SOLVE C The speed at which people…

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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Question

ONLY SOLVE C

The speed at which people type is measured in terms of words per minute (wpm). The WPM data file contains the typing speeds in wpm for 39 individuals. Download this data and import it into R or RStudio and answer the following questions.

(a) Use R to compute the mean, median, and standard deviation wpm.

Mean: x―=  wpm (Include all decimals printed by R)

Median: x~=  wpm (Include all decimals printed by R)

Standard deviation: s=  wpm (Include all decimals printed by R)

(b) Use R to compute the 30th percentile.

Answer:  wpm (Include all decimals printed by R)

(c) 35% of wpm values are greater than what wpm? Use R.

Answer:  wpm (Include all decimals printed by R)

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1 wordsperminute
38
3
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
PPP
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
49
47
69
55
69
58
64
77
54
48
60
57
50
57
40
74
35
63
40
74
70
46
72
44
57
53
64
47
51
70
59
63
61
47
72
68
59
74

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

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