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A statewide real estate agency, New Colony, specializes in residential home sales in southern California. Records indicate the mean selling time of homes is 90 days. Because of recent water concerns, the agency believes that the mean selling time may have increased. A regional survey of 100 homes sold recently revealed that the mean selling time was 94 days with a standard deviation of 22 days. At a .1 significance level, can we conclude that the mean selling time has increased?
The time a cashier spends processing individual customer's order are independent random variables with mean 2.5 minute and standard deviation of 2.
you take a trip by air that involves three independent flights. if there is an 77 percent chance each specific leg of
Determine the likelihood of accepting a lot which is 1% defective?
consider a normal population with micro 25 and ? 7.0.a calculate the standard score for a value x of 27.b calculate
Let X be a normal distributed random Variable with u=100 and o=10. the probability that X is between 70 and 100 is:
Using What's Best! (Or solver) find the least-cost matrix.
The formula C=5/9 (F-32) , where F is equal to or more than -459.6, represents Celsius temperature C as a function of Fahrenheit temperature F.
coefficient of variation and standard deviation are two measures of dispersion or spread among the data values. lets
A jar contains black and white marbles. Two marbles are chosen without replacement. If the probability of selecting a black marble and a white marble is 0.34, and the probability of selecting a black marble on the first draw is 0.47,
1.an srs of 20 third grade children is selected in chicago and each is given a test to measure their reading ability.
If a sample of 800 homes sold in 2004 is obtained what is the probability that between 175 & 200 homes are going to be investment?
Suppose 12% of these workers work more than 48 hours. Based on this percentage, what is the standard deviation of number of hours worked per week for those workers.
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