Find the standard deviation, s, of sample data summarized in the frequency distribution table below by using the formula below, where x represents the class midpoint, frepresents the class frequency, and n represents the total number of sample values. Use the calculator to find the standard deviation Interval Frequency Standard deviation 20-29 1 + + 30-39 1 (Round to one decimal place as needed) 40-49 + 50-59 60-69 15 70-79 39 80-89 32

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Find the standard deviation, s, of sample data summarized in the frequency distribution table below by using the formula below, where x represents the class midpoint, f represents
the class frequency, and n represents the total number of sample values. Use the calculator to find
the standard deviation.
Interval
Frequency
20-29
1
+
30-39
1
Standard deviation (Round to one decimal place as needed)
+
40-49
5
50-59
2
60-69
15
70-79
39
80-89
32
n
Transcribed Image Text:Find the standard deviation, s, of sample data summarized in the frequency distribution table below by using the formula below, where x represents the class midpoint, f represents the class frequency, and n represents the total number of sample values. Use the calculator to find the standard deviation. Interval Frequency 20-29 1 + 30-39 1 Standard deviation (Round to one decimal place as needed) + 40-49 5 50-59 2 60-69 15 70-79 39 80-89 32 n
K
Find the mean of the data summarized in the given frequency distribution. Compare the computed mean to the actual mean of 50.8 miles
Speed (miles per hour)
50-53
Frequency
42-45
28
The mean of the frequency distribution is miles per hour.
(Round to the nearest tenth as needed.)
46-49
12
54-57
3
r hour.
per
58-61
2
n
Transcribed Image Text:K Find the mean of the data summarized in the given frequency distribution. Compare the computed mean to the actual mean of 50.8 miles Speed (miles per hour) 50-53 Frequency 42-45 28 The mean of the frequency distribution is miles per hour. (Round to the nearest tenth as needed.) 46-49 12 54-57 3 r hour. per 58-61 2 n
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