Assume That the Population Distributions of Times (In Hours) of Two

Short Answer

Assume that the population distributions of times (in hours) of two different surgeries are normal with equal variances. Two random samples, drawn independently from the populations, showed the following statistics. Construct and interpret a 90% confidence interval for the true difference in mean amount of time of the two surgeries.
What is the 90% confidence interval? (CI)
CI = ______________ Enter (n1, n2)
Since this interval contains zero, the sample evidence ______________support that the two surgeries, on average, do not take significantly different amounts of time.