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Problem: A manufacturer of biscuits produces 3 times as many cream ones as chocolate ones. Biscuits are chosen randomly and packed into boxes of 10. Find the probability that a box contains equal numbers of cream biscuits and chocolate biscuits.
In the past an autoobile repair shop owner has noticed that sales increased ats certain economic indicators decreased. Calculate the expected sales increase and the standard deviation.
Average length of trout caught in Swanson lake is u=19.For a random sample of 51 fish caught the mean length was xbar=18.5 inches with estimated standard deviation s=3.2 inches.
Using the original data, test at the 5% significance level that the population standard deviation of studying times is greater than 4 hours.
The daily revenue totals for the next 30 days will be monitored. What is the probability that the mean daily revenue for the next 30 days will be between $7000 and $7500?
a researcher would like to evaluate the claim that large doses of vitamin c can help prevent the common cold. one group
1.a researcher is interested in comparing sat scores for students enrolled in public schools private schools and those
Assume you choose 20 houses at random. On average, how many houses of twenty would you expect to have DVD? Determine standard deviation of number of houses with DVD?
Compute the coefficient of determination, r 2 , and interpret its meaning.
A stockbroker at Critical Securities reported that the mean rate of return on a sample of 10 oil stocks was 12.6 percent with a standard deviation of 3.9 percent. The mean rate of return on a sample of 8 utility stocks was 10.9 percent with a stan..
A transatlantic plane carries 140 passengers. It is known that the average weight of all passengers on that plane is 147.14 pounds, that the men on that plane weigh on the average 170 pounds, and women 130 pounds. How many men and how many women w..
What is the probability you will have 20 or less flights that are late? What is the probability you will have more than 100 on time?
Conduct a hypothesis test for each sample at the 0.01 level of significance and determine what action, if any should be taken.
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