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Government statistics tell us that 2 out of every 3 American adults are overweight. Let X = number of Americans that are overweight. How large would an SRS of American adults need to be in order for it to be safe to assume that the sampling distribution of X is approximately Normal?
Revenue of Large Businesses A researcher estimates that the average revenue of the largest businesses in the United States is greater than $24 billion.
You are given the following frequency distribution for the number of errors 55 students made in a test:
A researcher obtains t = 4.00 and MD = 9 for a repeated-measures study. If the researcher measures effect size using the percentage of variance accounted for, what value will be obtained for r2?
Standard deviation of 10 minutes. A random sample of 16 cars is selected. What is the probability that the sample mean is between 45 and 52 minutes.
To determine the efficiency of the current ticket operation, Mike wishes to examine several queue operating characteristics.
At the .05 level of significance, is there evidence of a difference in variability in the shipping time between the two outlets? What decision should the carpet manufacturer make? Please provide step by step solution.
Use a P-value to test the claim about the population mean using the given sample statistics. State your decision for a=0.05. Claim: mean does not = 230
Describe how to draw the sample as a cluster random sample, using flights as the cluster. Describe how to draw the sample as a systematic sample from these flights.
Given this information, what would sampling error be if sample including seven values in top row were used to calculate sample mean?
Suppose you toss a die 100 times in a row. What is the probability that you see 4 spots between 10 and 20 times?
Many educators feel their grades should fit a normal distribution and often apply curves to make them fit one. One way to do this is to convert numeric grades to z scores using the mean and standard deviation for the grades, then use an equation s..
Medical research team studied the ages of patient who had strokes caused by stress. Ages of 34 patients who suffered stress strokes. Create frequency distribution for these ages.
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