# Question: Assume that the populations are normally distributed a Test whether 1

Assume that the populations are normally distributed.

(a) Test whether µ1 ≠ µ2 at the a = 0.05 level of signiﬁcance for the given sample data.

(b) Construct a 95% conﬁdence interval about µ1 - µ2.

(a) Test whether µ1 ≠ µ2 at the a = 0.05 level of signiﬁcance for the given sample data.

(b) Construct a 95% conﬁdence interval about µ1 - µ2.

## Relevant Questions

Assume that the populations are normally distributed. (a) Test whether µ1 > µ2 at the α = 0.1 level of signiﬁcance for the given sample data. (b) Construct a 90% conﬁdence interval about µ1 - µ2 Researchers conducted a randomized, double-blind study to measure the effects of the drug olanzapine on patients diagnosed with bipolar disorder. A total of 115 patients with a DSM-IV diagnosis of bipolar disorder were ...Researchers wanted to determine if carpeted rooms contained more bacteria than uncarpeted rooms. To determine the amount of bacteria in a room, researchers pumped the air from the room over a Petri dish at the rate of 1 ...A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 51 men and 70 women to participate in the study. Each subject was required to step up ...The following data represent the measure of a variable before and after a treatment. Does the sample evidence suggest that the treatment is effective in increasing the value of the response variable? Use the α = 0.05 level ...Post your question