A zoologist measured tail length in 86 individuals, all in the one-year age group, of the deermouse

Question:

A zoologist measured tail length in 86 individuals, all in the one-year age group, of the deermouse Peromyscus. The mean length was 60.43 mm and the standard deviation was 3.06 mm. The table presents a frequency of the data.7
Tail length (mm) Number of mice
[52,54).......... 1
[54,56) .......... 3
[56,58) .......... 11
[58,60) .......... 18
[60,62) .......... 21
[62,64) .......... 20
[64,66) .......... 9
[66,68) .......... 2
[68,70) .......... 1__
Total............. 86
(a) Calculate the standard error of the mean
(b) Construct a histogram of the data and indicate the intervals y ± SD and y ± SE on your histogram.
Distribution
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