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Question at position 24 Research Scenario: A psychologist believes that college students at their university sleep fewer hours than the national average of 7 hours per night. They collect sleep data from a random sample of 10 students and calculate a sample mean of 6.2 hours. The standard deviation for the sample is 1.1 hours. The psychologist performs a hand calculation and calculates a t-statistic of -2.49. Assume alpha = .05. No need to show work or round any numbers. What kind of test should we run? Printed Blank[input]Question Blank 1 of 4[input] What is the df? Question Blank 2 of 4[input] What is the t-critical value? (look this up on your t-table) Question Blank 3 of 4[input] Should the psychologist reject or fail to reject the null? Printed Blank[input]Question Blank 4 of 4[input] dependent samples t-testz-testindependent samples t-test1-sample t-testfail to rejectreject

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First, let's restate what's being asked and the data we have in this scenario. - The researcher assesses whether college students sleep fewer hours than the national average of 7 hours. - Sample: n = 10, sample mean x̄ = 6.2, sample standard deviation s = 1.1. - The computed t-statistic is t = -2.49, with alpha = 0.05. - The questions ask for the type of test, the degrees of freedom, the t-critical value, and the decision to reject or fail t......Login to view full explanation

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