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For a certain aptitude test, it is known from past experience that the average score is 1000 and the standard deviation is 125. If the test is administered to 100 randomly selected individuals, what is the probability that the value of the average score for this sample will lie in the internal 970 and 1030? Assume that the population distribution is normal.
The maximum allowable payback and discounted payback statistic for the project are 2 and 2.5 years, respectively. Use the NPV decision rule to evaluate this project; should it be accepted or rejected?
For each data set, compute and save g(m hat). Then do the following: Plot the histogram of B values of g(m hat)and sqrt(n)*[g(m hat)- g(m )].
Then suppose that a sample of 4000 women had produced the sample mean 275, and again give the 95% confidence interval for the population mean. What can you say about the effect of sample size on confidence intervals?
Suppose 18 customers are selected at random. What is the probability that between two and six people inclusive want hot peppers?
A researcher used stepwise regression to create regression models to predict Birth Rate (births per 1,000) using five predictors: Life Exp (life expectancy in years).
Solution utilizing graphical method. Compute the following linear programming problem. Among which of the following points (X, Y) is not a feasible corner point.
What can be completed to remedy multicollinearity.
A 90% confidence interval for the mean Math SAT score mu for the population of seniors is what? (Assume the population of Math SAT scores for seniors in the district is approximately normally distributed.
Compute the mean, standard deviation, median, and standard error for each group.
Using a 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
Find the standard error of the mean Also establish an interval estimate around the sample mean using one standard deviation of the mean.
Five persons donate blood at the clinic on a particular day. Find the probability that at least one of the five does not have Rh+ blood.
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