Some people who bought X-Game gaming systems complained about having received defective systems. The industry standard for such systems has been ninety-eight percent 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.
c.
At 95% confidence 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.
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