Question

Pick 3 correct inferences about the following hypothesis test to determine whether the mean thickness of aluminum sheets equals 0.05. Assume a 5% level of significance was used. A. The null hypothesis is mean 0.05". B. This is a one-tailed test. C. The chance of a Type 1 error is 1.4%. D, 68% of sheets should be +-0.01" of Hypothesis Test (One-Sample) Sample Size Sample Mean Sample Std Dev Hypothesized Mean Data Set #1 100 0.04739 0.01043 0.05 0.05 0.00104 Standard Error of Mean Degrees of Freedom t-Test Statistic p-Value the mean. we reject Ho at the 1% level. we reject Ho at the 5% level. 2.5051 0.0139 E, F.

Answer 1

From the given

The correct inferences are

1) the null hypothesis is mean =0.05

2)we reject null hypothesis at 5% level of significance because p-value is 0.0139

3)the chance of type 1 error is 1.4%

4)68% of sheets should be +/- 0.01 of the mean (using empirical rule).