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The mean weight of 500 students is 151 lbs and the standard deviation is 15 lbs. Assuming the weights are normally distributed, find out how many students weigh between 120 and 155 lbs.
The International Coffee Association has reported the mean daily coffee consumption for U.S. residents as 1.65 cups. Assume that a sample of 38 people from a North Carolina city consumed a mean of 1.84 cups of coffee per day
If appropriate, use the Tukey-Kramer procedure to examine differences among machines. What can you conclude about the effects of machines on breaking strength? Explain.
Can you conclude that information in article is untrue? Use 0.05 significance level. Find out p-value and explain its meaning.
What is the probability that the graduate selected will be a male who is not a member of a sports team? What is the probability that the graduate will be either a female or a member of a sports team?
Jim owns three real estate offices in Anytown. He has decided to open one more office, but cannot decide between hometown or uptown as the towns where he wants to locate.
In large accounting firm, the proportion of accountants with MBA degrees and at least five years of professional experience is 0.75 times the proportion of accountants with no MBA degree and less than 5 years of professional experience.
Assume that, the standard deviation of a monthly rents paid by students in a particular town is $40 A random sample of 100 students was taken to estimate the mean monthly rent paid by the whole student population- solution?
From historical data, Harry's Car Wash estimates that dirty cars arrive at the rate of 10 per hour all day Saturday. With a crew working the wash line, Harry figures that cars can be cleaned at the rate of one every 5 minutes.
The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivation, attitude, and study habits of college students.
Fast Service Truck Lines uses the Ford Super Duty F-750 exclusively. Management made a study of the maintenance costs and determined the number of miles traveled during the year followed the normal distribution. The mean of the distribution was 60..
If Molly and Kathleen wishes to make a profit of $5,000 for summer, how many pupils do they require to enrol?
Golf course designers are concerned that the old courses are becoming obsolete because new equipment enables golfers to hit the ball so far. One designer believes the new course need to build with the expectation that players will be able to hit t..
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