Create confidence interval-proportion of non-fatal accidents
A survey of 400 non-fatal accidents showed that 141 involved the use of a cell phone. Contruct a confidence interval for the proportion of non-fatal accidents that involved a cell phone at a 95% confidence interval.
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A random sample of 150 apples is collected and examined. the whole truckload of apples will be rejected if more than 5% of the sample is unsatisfactory. suppose that in fact 8% of the apples on the truck do not meet the standards.whats the probabi
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Contruct a confidence interval for the proportion of non-fatal accidents that involved a cell phone at a 95% confidence interval.
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A previous study indicated that the standard deviation was 4.6 days. How large a sample must be selected if the company wants to be 85% confident that the true mean differs from the sample mean by no more than 1 day?
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Is there evidence of a difference in the mean battery life between the two types of digital cameras at the 95% confidence level.
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