Many people who bought X-Game gaming systems over the holidays have complained that the systems they purchased were defective. In a sample of 1200 units sold, 18 units were defective.
a.Determine a 95% confidence interval for the percentage of defective systems in the population.b.If 1.5 million X-Game gaming systems were sold over the holidays, determine an interval for the number of defectives in sales.
What will be an ideal response?
?
a. | .00812 to .02188 (rounded) |
b. | 12,184 to 32,816 (using unrounded estimates) |
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