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Mathematics, 26.03.2021 19:40 kenken2583

In August of 2012 the national average price for a gallon of regular unleaded gasoline was $3.85. A sample of gas stations in the state of Illinois was taken and the sample had an average price of $3.98. It is of interest to use this sample to test if the average gas price in Illinois is higher than the national average. The standard error is 0.069. Use a significance level of 5% Stat. Null The formula for the randomized test statistic is z= Find SE the value of the randomized test statistic. Round to three decimal places.

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