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A random sample obtained from a population has a mean of µ=100 and a standard deviation of σ = 20. The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean for a sample of n = 100 is 2 points. Explain the difference in the standard error for the two samples.
Using symbols state hypotheses (H 0 and H 1 ) for two-tailed test. Sketch suitable distribution and locate critical region for a = 0.05.
Compute fraction of the employees cost between $1,500 and $2,000 per year? Evaluate percent that didn't have any dental expense.
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
A sample of 50 provided a sample mean of 14.15. The population standard deviation is 3.
Use α =.01 and test for a significant difference. What is your conclusion?
What is the probability for the given frequency distribution?
What is the probability that a person who has submitted one entry will win the following?
How many dissimilar computer passwords are possible?
Evaluate the multiple regression model between quantity sold (Y) and following explanatory variables: average price of deep-dish pizzas, monthly advertising expenditures, and disposable income per household in areas surrounding outlets.
If you have multiple regression output with 2 independent variables and R-Square is .9682, what does R-Square indicate?
Calculate the appropriate test statistic to test the hypotheses related to the concern and test at 5% and 1%.
A random sample of 100 oranges is gathered and the mean diameter obtained was 5.12. If another sample of 100 is taken, what is the possibility that its sample mean will be greater than 5.12 inches.
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