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Shoe manufacturers must know the distribution of foot sizes of different age group. Foot size of 10 inch or above is defined as big size. 15% of 160 randomly selected Ontario men were with big feet. Write down the upper limit of 96% confidence interval for the proportion of Ontario men with big feet. Give your answer to 3 decimal places. (If the CI = (1.2, 3.8) then upper limit of the CI is 3.8)
The necessary sample size has been calculated as n = 100. If the client suddenly decides that the maximum error must be only one-fourth that originally specified, what sample size will now be necessary?
a town has 20 000 registered voters of whom 8800 are democrats. a survey organization takes a simple random sample of
The probability that a dart hits inside the circle is proportional to the ratio of the area of the circle to the area of the square. Use this fact to calculate an approximation to Π and print the result.
A television station estimates that 45% of college students watch the Super Bowl. For a sample of 240 students selected at random, what is the mean and variance of the number of students who watch this game?
Below are revenue and profit (both in $ billions) for nine large entertainment companies.
At 99% confidence, test to determine if there is sufficient evidence to indicate that process 2 takes a significantly longer time to manufacture the Zip drives.
If 10 percent of the balls in a certain box art red and if 20 balls are selected from the box at random, with replacement
the percentage of couples where both parties are in the labor force is 52.1. choose 5 couples at random. find the
A Six-Sigma Black Belt is studying the performance of financial analysts from a bank using their scores on a certain aptitude test. She has collected data on a random sample of 52 analysts with an average of 85 and standard deviation of 4.2.
Due to increase in product demand, management needs to increase labor production hours by an estimated 270 hours. Any-Business currently has 30 production employees whose hourly wages varies from $7.50 - $8.50 per hour.
What is the minimum number of words the child would have to know to be in the top 2%?
a researcher performs a hypothesis test at the 0.05 level of significance. the null hypothesis is p 0.85and the
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