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Researcher found that fifth-grade students completed more mathematics problems correctly when simple problems were mixed in with
their regular math assignments. In order to test this hypothesis, a researcher selects a standardized mathematics achievement test that produces a normal distribution of scores with a mean of μ = 100 and standard deviation of σ =18. The researcher modifies the test by inserting a set of very easy problems among the standardized questions, and gives the modified test to a sample of n = 36 students. If the average test score for the sample is M = 104, (Use α = .01), figure the 99% of confidence interval (Do not need to conduct a hypothesis test)
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