6.2.4      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 distribution 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

of the mean for the 500 new measurements?