Automotive engineers have found that the gas mileage in highwaydriving of a certain sports utility van is normally distributed witha mean of 13.6 kilometers per liter and a standard deviation of1.5 kilometers per liter.Find the probability that a random sample of 20 sports utilityvans has a mean exceeding 14 kilometers per liter.O P(Z > 1.19) = 0.1170O P(Z > 1.19) = 0.8830%3DO P (Z > -1.19) = 0.8830O P (Z < -1.19) = 0.1170

Given that information Mean (mu) = 13.6 kilometres Standard deviation (s) = 1.5 kilometres Sample…

Answered: Lutomotive engineers have found that…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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There is some evidence that REM sleep, associated with dreaming, may also play a role in learning and memory processing. For example, Smith and Lapp (1991) found increased REM activity for college students during exam periods. Suppose that REM activity for a sample of n = 16 students during the final exam period produced an average score of M = 143. Regular REM activity for the college population averages μ = 110 with a standard deviation of σ = 50. The population distribution is approximately normal. Do the data from this sample provide evidence for a significant increase in REM activity during exams? Use a one-tailed test with α= .01. Compute Cohen’s d to estimate the size of the effect. Write a sentence describing the outcome of the hypothesis test and the measure of effect size as it would appear in a research report.
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