Question

(20.60 S-AQ) To study the metabolism of insects, researchers fed cockroaches measured amounts of a sugar solution. After 2, 5, and 10 hours, they dissected some of the cockroaches and measured the amount of sugar in various tissues. Five roaches fed the sugar D-glucose and dissected after 10 hours had the following amounts (in micrograms) of D-glucose in their hindguts:

Amounts of D-glucose

55.95

68.24

52.73

21.5

23.78

The researchers gave a 98% confidence interval for the mean amount of D-glucose in cockroach hindguts under these conditions. The insects are a random sample from a uniform population grown in the laboratory. We therefore expect responses to be Normal.

The mean (±0.01) and the standard deviation (±0.0001) of the SRS are:   
x¯¯¯x¯ =      s = .

The critical value (±0.001) from the distribution for 98% confidence interval is:   
t* = .

What confidence interval (±0.01) did the researchers give? _____to _____.

Answer 1