Use a significance level of 0.05 to test the claim that the average life of cell...

Use a significance level of 0.05 to test the claim that the average life of cell phones equals 5 years. This is done after a study where the following statistical data are collected: n = 27, (x bar) ̅ = 4.6 years and s = 1.9 years.
a) Indicates Ho Ha,
b) draw the graph,
c) find the critical value,
d) find the t-statistic,
e) performs the hypothesis test to reject or fail to reject the null hypothesis.
f) Find the interval at 95% confidence
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orchestra answered 1 year ago

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