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A random sample is obtained from a population with a mean of µ=50 and a standard deviation of σ=12. For a sample of n=4 scores, would a sample mean of M=55 be considered an extreme value or is it a fairly typical sample mean? For a sample of n=36 scores, would a sample mean of M=55 be considered an extreme value or is it is fairly typical sample mean?
Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical conclusion about the null hypothesis and final conclusion that addresses the original claim.
Setup Null and Alternate hypotheses to test if average amount of soda in each can is less than 32 oz. Please test the hypothesis using a = 0.05.
If all the other quantities remain the same, how does the indicated change affect the width of the confidence interval?
Calculate and interpret the appropriate statistical test to determine the relationship between the following two variables. Use the five-step model of hypothesis testing to draw conclusions at the .05 level of significance
Frequently, tests tha yeild abnormal results are repeated for confirmation. What is the probability that for a normal person a test will be at least 1.5 times as high as the upper limit of normal on two seperate occasions.
What is the probability that 6 or more claims are made by males under 25? (C) What is the expected number of claims made by males under 25? What is the standard deviation of the distribution?
The number of customers who have requested a reservation at full fare for this flight in the past always has a normal distribution with mean 40 and standard deviation 10. Determine how many seats should be reserved for customers who pay full fare.
A researcher plans a study in which a crucial step is offering participants a food reward. It is important that the three food rewards be equal in appeal.
A random sample of 49 employees took a computer literacy test. The sample resulted in a mean score of 75 with a standard deviation of 21. Develop an approximate 95% confidence interval for the population mean of the 600 employees.
You have been asked to develop a study of the effects of watching Sesame Street on childrens' gender role orientations, intelligence, or sociability.
The U.S. Commission of Crime wishes to estimate the fraction of crimes related to firearms in an area with one of the highest crime rates in the country.
In a poll of 400 randomly selected voters, 204 of them support the strategist's candidate. At = .05, is the political strategist's claim warranted?
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