Compute a 95 confidence interval for the population

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Question 106 / 6 pointsCompute a 95% confidence interval for the population mean, based on the sample numbers 21, 28, 33, 34, 25, 26, and 135.
Find the lower and upper limits of the interval.
View FeedbackQuestion 116 / 6 pointsChange the last value to 27 and re-compute the confidence interval.The numbers now are: 21, 28, 33, 34, 25, 26, and 27
Question 126 / 6 pointsWhat is an outlier and how does it affect the confidence interval?
View FeedbackQuestion 135 / 5 pointsThe 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 = $43.20.Using a significance level of .1, what are the boundaries of the confidence interval?302.438 - 326.184300.618 - 330.182297.485 - 327.820282.871 - 338.475
View FeedbackQuestion 145 / 5 pointsThe 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 = $43.20.Using the .10 level of significance, is there evidence that the population mean is above $300?

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