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Assume that the standard deviation of 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.
a. What is the standard error of the sample mean monthly rent?
b. What is the probability that the sample mean exceeds the population mean by more than $5? (Hint: Look at the z formula. What is the result of the numerator of the formula?)
c. What is the probability that the sample mean is more than $4 below the population mean?
d. What is the probability that the sample mean differs from the population mean by more than $3?
What is Peter's median grade point at graduation? What is the shape of the grade point distribution?
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
The given level of significance is an alpha of .005. Your MSA is 6,200 and your MSW is 1,000. Will you reject your null hypothesis that all population means are equal or will you not reject?
What do these results say about testing with group data? Include in your answer the URLs of the sites where you found the necessary data.
Customers arrive at an automated coffee vending machine at a rate of 4 per minute, following a Poisson distribution. What is the average number of people waiting in line?
In this problem, we will analyze the profit found for sales of decorative tiles. A demand equation (sometimes called a demand curve) shows how much money people would pay for a product
The snowball strikes the ground if it doesn't strike anything else while falling? (b) A man 1.9 m tall is standing 4 m from the edge of the barn. Will the snowball hit him?
Although there is a popular belief that herbal remedies such as ginkgo biloba and ginseng may improve learning and memory in healthy adults, these effects are usually not supported by well-controlled research.
A banks loan officer rates applicants for credit. The ratings are causally distributed with a mean of 200 also a standard deflation of 50.
Let X be random variable which counts number of cars that, in given unit of time, pass by Joe's Barber Shop on Main Street. Determine the distribution of X?
In rectangular coordinate system, determine the distance between the points (-4,1) and (8,6).
A sample of 40 observations is selected from one somewhat normal population. The sample mean is 102 and the sample standard deviation is 5.
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