The director of admissions at the university of

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The director of admissions at the University of Maryland, University College is concerned about the high cost of textbooks for the students each semester. A sample of 25 students enrolled in the university indicates that x(bar) = $315.40 and s = $75. (Note the sample standard deviation is different from the first part). A mean that is in a confidence interval is not rejected by the confidence interval, and we say the evidence against the mean is not significant. At the 0.05 level of significance, is there evidence against mean $300? Question options: No, because 300 is below the lower limit of the confidence interval Yes, because 300 is below the lower limit of the confidence interval No, because 300 is in the confidence interval Yes, because 300 is in the confidence interval
View Feedback 7 / 7 points Explain the difference between parts A and C. In both parts we are asked whether or not there is evidence that the population mean was over $300. In part A: x(bar) = $315.40; s = $43.2; Sample size = 25 In part C: x(bar) = $315.40; s = $75; Sample size = 25
The larger standard deviation adds uncertainty in the sample. The sample may have had some outliers. The smaller standard deviation adds uncertainty in the sample. The sample may have had some outliers. View Feedback 100 / 100 - 100 % 100 / 100 - 100 % Done

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