In order to determine the average weight of carry on luggage by passengers in airplanes, a sample 25 pieces of carry on luggage was collected and weighed. The average WSU eggy was 18 pounds. Assume that we know the standard deviation of the population to be 7,5 pounds. Determine a 97% confidence interval estimate for the mean weight of the carry on luggage(rounded off to two decimals)
In order to determine the average weight of carry on luggage by passengers in airplanes, a sample 25 pieces of carry on luggage was collected and weighed. The average WSU eggy was 18 pounds. Assume that we know the standard deviation of the population to be 7,5 pounds. Determine a 97% confidence
The sample poll of 150 voters chosen at random from all voters in a given district indicated that 44% of them are in favour of a particular candidate. The 99% confidence interval for the proportion of all voters in favour of this candidate (rounded off to two decimals)
A 30 month study is conducted to determine the difference in rates of accidents per month between two departments in an assembly plant. If a sample of 12 from the first department averaged 12,3 accidents per month with a standard deviation of 3,5 and a sample of 9 from the second department averaged 7,6 accidents per month with standard deviation of 3,4. The 95% confidence interval between the difference in rates between the two departments (rounded off to three decimals) is
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