The following data represent the scores (in words per minute) of 25 computer encoders on a speed test. Complete the table and answer the questions below. Scores f Xm fXm

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter6: Ratio, Proportion, And Probability
Section6.2: Writing And Solving Problems
Problem 9C
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Measure of Variability 

The following data represent the scores (in words per
minute) of 25 computer encoders on a speed test.
Complete the table and answer the questions below.
Scores
f
Xm
fXm
<cf
54 - 58
59 - 63
64 - 68
8
69 - 73
1
74 - 78
3
79 - 83
84 - 88
From the frequency table above, answer the following:
1.
Class size
2.
Number of computer encoders with scores greater
than 63
3.
Percentage of computer encoders with scores less
than 69
4.
The 50th percentile class
5.
QI
6.
Q3
7.
D2
8.
D4
9.
P60
10. P90
Transcribed Image Text:The following data represent the scores (in words per minute) of 25 computer encoders on a speed test. Complete the table and answer the questions below. Scores f Xm fXm <cf 54 - 58 59 - 63 64 - 68 8 69 - 73 1 74 - 78 3 79 - 83 84 - 88 From the frequency table above, answer the following: 1. Class size 2. Number of computer encoders with scores greater than 63 3. Percentage of computer encoders with scores less than 69 4. The 50th percentile class 5. QI 6. Q3 7. D2 8. D4 9. P60 10. P90
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