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

question 136

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.

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Definitions:

Puzzle Box

An experimental apparatus used in animal learning research, where an animal must solve a problem or manipulate mechanisms to escape or obtain a reward.

Law of Effect

A principle in psychology that states behaviors followed by positive outcomes are likely to be repeated, while those followed by negative outcomes are less likely to be repeated.

Pleasurable Consequence

A positive outcome or reward that follows a behavior, increasing the likelihood of the behavior being repeated.

Positively Reinforced

A process in behavioral psychology whereby a behavior is encouraged by rewards, leading to an increase in the likelihood of its recurrence.