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Sample standard deviation

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1. A random sample of size 41 students is taken, resulting in a sample age mean of 20.5 years old and a sample standard deviation of 6.5 years. Assume x is normally distributed and you want to set alpha equal to 0.05. Using this information, test the following hypotheses

Ho: μ = 18 Ha: μ ≠ 18

a. Compute the relevant test statistic

b. Can you reject the null hypothesis? Why or why not?

c. Can you reject the null hypothesis using a 95% level of confidence?

Reference no: EM131493671

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