One-Sample t Test Refer to Example 10.3, in which the average weight of diamonds using a new process was compared to an average weight of 0.5 karat. 1. Enter the six recorded weights-0.46, 0.61, 0.52, 0.48, 0.57, 0.54-in column C1 and name them "Weights." Use Stat Basic Statistics 1-Sample t to generate the dialogue boxes in Figure 10.23.

2. To test Ho=0.5 versus Ha: > 0.5, use the list on the left to select "Weights" for the box marked "Samples in Columns." Check the box marked "Perform hypothesis test." Then, place your cursor in the box marked "Hypothesized mean:" and enter .5 as the test value. Finally, use Options and the drop-down menu marked "Alternative" to select "greater than." You can change the default confidence coefficient of .95 if you wish. Click OK twice to obtain the output in Figure 10.24.

1-Sample Test and Confidence Interval Weights 1-Sampiet Options Confidence level 50 C Sud deta Perform hypothet Hypothesized mean Options... Cancel