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Suppose a population distribution of SAT scores has mean 504 and standard deviation 111. A sample of size 1000 is obtained from this population. What is the mean of the sampling distribution of the sample mean?
The mean starting salary for college graduates in the spring of 2000 was$31,280. Assume that the distribution of starting salaries follows the normal distribution with a standard deviation of 3,330.
The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed,
How might variance and standard deviation be applied to a real-world business-related problem? Provide a specific application in which these measures are useful.
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
Describe a scenario related to the final project in which you would use repeated-measures ANOVA. Describe a scenario related to the final project in which you would use MANOVA.
Test at the .05 significance level the null hypothesis that the population proportions are equal against the two-tailed alternative.
Senator Hayes is considering a a run for the U.S. presidency, but she is only 35 years of age, which is the minimum required age. While investigating this issue, she finds the ages of past presidents when they were inaugurated
A part of our research design is the data collection process. We often do this by sampling. Differentiate between random and nonrandom sampling methods.
The standard deviation is 2.5 pounds. Find the probability that the mean of a sample of 55 families will be more than 13 pounds.
The chamber of commerce of a Florida Gulf Coast community advertises that area residential property is available at a mean cost of $125,000 or less per lot.
A brand name has 60% recognition rate. if the owner of the brand wants to verify that rate by beginning with a small sample of 5 randomly selected consumers, find the probability that exactly 3 of the 5 consumers recognize the brand name. Also fin..
Construct three scatter plots for: (1) percentage alcohol versus calories, (2) percentage alcohol verses carbobydrates, and (3) calories versus carbohydrates
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