Question

A researcher intends to estimate the eflect of a drug on the scores of human subjects performing a task of psychomotor coordination. The members of a fandom sample of 9 subjects were given the drug prior to festing. The mean score th this group was 9.38 , and the sample variance was 17.81 . An independent random sample of 10 subjects was used as a control group and given a placebo prior to testing. The mean score in this control group was 15.33 , and the sample variance was 27.75 . Assuming that the population distributions are normal with equal variances, find a 90% confidence interval for the difference between the population mean scores The confidence inferval is ◻ <\mu _(x)-\mu _(y)< ◻ (Round to two decimal places as needed.)

          A researcher intends to estimate the eflect of a drug on the scores of human subjects performing a task of psychomotor coordination. The members of a fandom sample of 9 subjects were given the drug prior to festing. The mean score th this group was 9.38 , and the sample variance was 17.81 . An independent random sample of 10 subjects was used as a control group and given a placebo prior to testing. The mean score in this control group was 15.33 , and the sample variance was 27.75 . Assuming that the population distributions are normal with equal variances, find a 90% confidence interval for the difference between the population mean scores
The confidence inferval is ◻ <\mu _(x)-\mu _(y)< ◻
(Round to two decimal places as needed.)

a researcher intends to estimate the eflect of a drug on the scores of human subjects performing a task of psychomotor coordination the members of a fandom sample of 9 subjects were given th 56684

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