Question

What is the life span of a lab mouse? You measured the following life spans (in days) for a certain standard inbred laboratory strain.

1066, 837, 732, 963, 933, 791, 504, 609, 1191, 734, 653, 803

You may assume for the following questions that the distribution of life span is normal.

(d) Calculate the margin of error mm for a two-sided confidence interval. m=

(e) The lower bound of the two-sided confidence interval is ___ and the upper bound of the two-sided confidence interval is ___ .

(f) Calculate the critical value t⋆ for the 86 percent lower-bound confidence interval. t⋆=

Answer 1