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1. The value of z score in hypothesis test is influenced by the various factors. Assuming that all other variables are held constant describe how value of z is influenced by each of the following:
a. increasing difference b/w sample mean and orginal population mean.b.increasing population standard deviation.c. increasing number of scores in the sample.
2. If alpha level is changed from a = .05 to a = .01,
a. What occurs to boundaries for the critical regions?b. What occurs to probability of a type I error?
A polling organization plans to sample 1000 adult Americans to estimate the proportion of Americans who think crime is a serious problem in this country. (a) What is the parameter of interest to the polling organization? (b) What will be the stati..
Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
Determine the sample size necessary to estimate a population mean to within 1 with a 90% confidence given that the population standard deviation is 10, Suppose that the sample was calculated at 150. Estimate the population mean with 90% confidence..
What are the assumptions and requirements for an LP model to be formulated and used? Under what conditions will an LP problem: be unbounded? be infeasible? have more than one optimal solution?
A five-year old study claims that selling prices of new homes / condominiums in the New York area have a normal distribution with mean = $180,000 and standard deviation = $40,000.
Determining the probability that the two choose the same number?
You have 4 groups that you are trying to find if there is a difference in any of the population means. In each group there are 7 observations. The given level of significance is an alpha of .005. Your MSA is 6,200 and your MSW is 1,000. Will you r..
Find out coefficient of correlation between variables. Interpret the value.
Multiple comparison procedures are going to be done using the Bonferroni method with α = 0.10. The value of t** is 2.2426. The smallest minimum significant difference (MSD) for finding a difference between groups is computed as 17.68. The correct ..
Solve the problem: According to police sources a car with a certain protection system will be recovered 94% of the time. Find the probability that 4 of 8 stolen cars will be recovered.
A sample of n observations is taken from a population. When performing statistical inference about a population variance, the appropriate chi-square distribution has:
In this paper present the Construction of confidence Intervals and the Proper Interpretation of confidence Intervals and show appropriate examples in the education environment.
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