The accuracy of a coin-counter machine is gauged to accept nickels with a mean diameter of millimeters 21.21 mm. A sample of 45

Question

The accuracy of a coin-counter machine is gauged to accept nickels with a mean diameter of millimeters 21.21 mm. A sample of 45 nickles was drawn from a reported defective coin-counter machine located near a school. The sample had a sample mean of 21.211 mm and sample standard deviation 0.011 mm.
Test the claim that the mean nickel diameter accepted by this coin-counter machine is greater than 21.21 mm. Test at the 0.1 significance level.
(a) Identify the correct alternative hypothesis Ha:
μ < 21.21
μ > 21.21
μ = 21.21
Give all answers correct to 4 decimal places.
(b) The test statistic value is:
(c) Using the Traditional method, the critical value is:
(d) Based on your answers above, do you:
Fail to reject Ho
Reject Ho
(e) Explain your choice in the box below.

Kunduz · Accepted Answer

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