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College students often make substantial portion of population of college cities and towns. State College, Pennsylvania, ranks first with 71.1% of its population made up of college students. Determin
How do you distinguish between the two main effects & the interaction in the structure of a Two-factor analysis?
Day care centers in large cities like New York and San Francisco are notoriously expensive. Assume that day care costs are normally distributed with a mean equal to $9,000 and a standard deviation e
Explain a condition in your past professional or personal experience in which a hypothesis test may have proven useful. What null and alternative hypotheses would you test? What kind of test would
Once the linear regression model is developed, it can be used to make predictions for any values of the dependent variable or variables. Why is it not appropriate to do that?
An urn containing 4 red chips, 5 green chips, and 3 white chips. A chip is drawn sequentially at the random with replacement. Let X be the number of draws till at least one red chip, one green chip
A random sample of n = 25 children was surveyed and sample mean number of hours children watched television in week was calculated to be = 27.191 hrs. With a sample standard deviation of s = 7.554 h
For a regulated a=0.05. Find out the critical value c associated with test produce which will minimize the probability of committing Type II error, ß.
It is known that this number of fares x is a value of random variable X that has probability distribution with unknown mean µ and known standard deviation σ = 50. A random sample of n =
The average time that a surveilance camera will run with out having to be resent is 50 days. Find the probability that such a camera will not have to be reset in at least 60 days.
Find the distribution function along with the mean, variance, and standard deveation of x.
Assume a research firm conducted a survey to find out the average amount of money steady smokers spend on cigarettes throughout a week. A sample of 100 steady smokers revealed that the sample mean i
As the size of the sample increases, what happens to the shape of the sampling means?
All possible samples of size n are chosen from a population and the mean of each sample is determined. What is the mean of the sample means?
For a population that is not normally distributed, the distribution of the sample means will
Compute the population mean margin of the error for a 95% confidence interval when sigma is 9 and the sample size is 121.
An urn contains originally 2 red chips and 3 white chips. A chip is drawn at the random and replaced by chip of opposite color. Let X by the number of red chips after 4 draws. Find out the p.m.f. of
At a carnival you win a prize if you get heads, you should first choose a coin. There is a fair and biased coin, while choosing each coin is equally likely, the biased coin has 74% of landing tails.
A credit card company is interested in determining the difference between the mean ages of females and males who have accounts with their company. Results from independent samples of customers are s
Employ a generating function for modeling the number of distributions of 18 chocolate bunny rabbits into four Easter baskets with at least 3 rabbits in each basket. Which coefficient do we want?
An urn contains 8 red chips. Each and every time a chip is drawn at random, it is replaced by white chip only if the chip drawn is a red chip. Determine the expected number of draws needed so that a
Nationwide, 65 percent of persons taking certain professional certification exam pass. Suggest, for samples of 200, the sampling distribution of that p. (Each answer must be entered as a proportion
Create a Venn diagram to reflect the data, lable the diagram clearly. Then use the diagram to answer the following questions:
Assume that Y1, Y2, ..., Yn constitute a random sample from the density function
WINK, Inc. is made up of 450 employees who work a total of 13,500 hours per week. If the number of weekly work hours per person has a normal distribution and the standard deviation equals 7 hours, h