Score: 0 of 1 pt 7 of 15 (6 complete)
HW Score: 38.33%, 5.75 of 15 pts
3.3.38
Question Help
o
Find the standard deviation, s. of sample data summarized in the frequency distribution table given 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. Also, compare the computed standard deviation to the standard deviation obtained from the original list of data values, 9.0.
[E(•x?)]- [%cf-x))?
SE
n(n-1)
Interval
Frequency
40-49
50-59
60-69
20-29
5
30-39
20
70-79
5
43
16
8
Standard deviation (Round to one decimal place as needed.)