Some people who bought X-Game gaming systems complained about having received defective systems. The industry standard for such gaming systems has been 98% non-defective systems. In a sample of 120 units sold, 6 units were defective.
a.Compute the proportion of defective items in the sample.b.Compute the standard error of 
.c.At a 5% level of significance using the critical value approach, test to see if the percentage of defective systems produced by X-Game has exceeded the industry standard.d.Show that the p-value approach results in the same conclusion as that of part b.
What will be an ideal response?
?
| a. | .05 |
| b. | .0128 |
| c. | Test statistic z = 2.35 > 1.645; reject H0; the number of defects has exceeded the industry standard. |
| d. | p-value (.0094) < .05; reject H0. |
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