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We'd like to find how much money the average shopper spends at the mall per trip. We sample 75 shoppers and we find that their spending averages $49.80. Assume the standard deviation of the population is $16.55, find a 90% confidence interval for the true mean of the spending. What is the upper limit of the interval?
You will watch some informative videos to become familiar with SPSS, enter data, and then answer some basic questions about a data set
Using the appropriate statistical table, what is the approximate p-value for this test? Construct and interpret the 99% confidence interval for the difference between the population means.
the quality control department at malcomb products must either inspect each part in a lot or not inspect any of the
Find the mean, variance, and standard deviation of the number of buyers who purchase white flip-flops
let x follows a binomial distribution with mean equals .55 and standard deviation equals .7228. find n and
1. consider a sample of 30 wmu engineering alumni. the population average salary is 55000 and amongst the 30 alumni the
Twenty percent of U.S. mortgages are "underwater" (The Boston Globe, March 5, 2009). A mortgage is considered underwater if the value of the home is less than what is owed on the mortgage. Suppose 100 mortgage holders are randomly selected.
A study by the department of Environmental Protection of NJ showed that the average number of airplanes flying through the town of Wayne is four per hour.
A random variable. Suppose that the random variable X has mean 10 and variance 25. Find the mean and standard deviation of 2X
A management consultant wants to determine whether the age and gender of a restaurant's wait staff influence the size of the tip the customer leaves.
How many variables are there in this study? What are the levels of any variable you identified?- What hypothesis test would be used to analyze these data? Justify your answer.
give an example of global sustainability that demonstrates your understanding of the
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