The accuracy of a coin-counter machine is gauged to accept nickels with a mean diameter of millimeters 21.21 mm. A sample of 44 nickles was drawn from a reported defective coin-counter machine located near a school. The sample had a sample mean of 21.213 mm and sample standard deviation 0.008 mm. Test the claim that the mean nickel diameter accepted by this coin-counter machine is greater than 21.21 mm. Test at the 0.01 significance level.

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The accuracy of a coin-counter machine is gauged to accept nickels with a mean diameter of
millimeters 21.21 mm. A sample of 44 nickles was drawn from a reported defective coin-counter
machine located near a school. The sample had a sample mean of 21.213 mm and sample standard
deviation 0.008 mm.
Test the claim that the mean nickel diameter accepted by this coin-counter machine is greater than
21.21 mm. Test at the 0.01 significance level.
Transcribed Image Text:The accuracy of a coin-counter machine is gauged to accept nickels with a mean diameter of millimeters 21.21 mm. A sample of 44 nickles was drawn from a reported defective coin-counter machine located near a school. The sample had a sample mean of 21.213 mm and sample standard deviation 0.008 mm. Test the claim that the mean nickel diameter accepted by this coin-counter machine is greater than 21.21 mm. Test at the 0.01 significance level.
Give all answers correct to 4 decimal places.
(b) The test statistic value is:
() Using the Traditional method, the critical value is:
Transcribed Image Text:Give all answers correct to 4 decimal places. (b) The test statistic value is: () Using the Traditional method, the critical value is:
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