Course Solutions Uncategorized (Answered) : Random Sample 25 Values Drawn Mound Shaped Symmetric Distribution Sample Mean 8 Sample Sta Q28358702

(Answered) : Random Sample 25 Values Drawn Mound Shaped Symmetric Distribution Sample Mean 8 Sample Sta Q28358702

A random sample of 25 values is drawn from a mound-shaped and symmetric distribution. The sample mean is 8 and the sample standard deviation is 2. Use a level of significance of 0.05 to conduct a two-tailed test of the claim that the population mean is 7.5. (a) Is it appropriate to use a Students t distribution? Explain Yes, because the x distribution is mound-shaped and symmetric and ? is unknown. No, the x distribution is skewed left. No, the x distribution is skewed right No, the x distribution is not symmetric. No, ? is known. How many degrees of freedom do we use? 24 (b) What are the hypotheses? O Ho: ?-7.5; H1: ? > 7.5 O Ho: ? > 7.5; H1??+7.5 (c) Compute the t value of the sample test statistic. (Round your answer to three decimal places.) t-1.000

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