Adam tabulated the values for the average speeds on each day of his road trip as...

Adam tabulated the values for the average speeds on each day of his road trip as 60.5, 63.2, 54.7, 51.6, 72.3, 70.7, 67.2, and 65.4 mph he wishes to construct a 98% confidence interval what value of t* should Adam use to construct the confidence interval?

Solutions

Expert Solution

Here we can find t value by using two forms

Fist form, here CI=98% so and df=n-1=8-1=7

The t-critical values for a two-tailed test, for a significance level of α=0.02 are

tc=−2.999 and tc=2.999

So t value is 2.999

Graphically

Second form, we can also find value of t using online t table

So answer is t value for 98% CI is 2.999

milcah answered 8 months ago

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