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A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = .05, does vehicle type vary by mall location? (Data are from a project by MBA students Steve Bennett, Alicia Morais, Steve Olson, and Greg Corda.) Vehicles Vehicle Type
Somerset
Oakland
Great lakes
Jamestown
Total
Car
44
49
36
64
193
Mini Van
21
15
18
13
67
Full Sized Van
2
3
10
Suv
19
27
26
12
84
Truck
14
6
17
9
46
Col Total
100
400
A sample of 50 male and 50 female infants were put on an experimental infant formula. After two weeks the parents of each infant were asked to fill out a questionnaire concerning infant satisfaction on the formula. One of the questions was "Did Ba..
The student body of a large university comprises 60% female students. Elucidate what is the probability that the students in the sample exactly two are female?
The owner was interested in the mean time required to service this model, and decided not to carry the model if the mean repair time appeared to be more than 40 minutes.
Compute descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Compute the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which..
Using alpha = 0.05 and a computed value of +4.49, can we conclude that the percentage of claims for married policyholders is less then for single policyholders?
The null hypothesis is that there was no change in average liquor consumption. State this formally in terms of µ.
Determine a 95 % confidence interval for the iron concentration.
A random sample of 15 paired observations has a correlation of -.46. Can we conclude that the correlation in the population is less than zero? Use the .05 significance level.
Suppose population standard deviation for those drinking regular coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated coffee.
Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error?
Create the table for frequency distribution that has 16 class intervals of width 1 inch. Utilize 61.5 inches as lower limit of first interval and 62.5 as upper limit.
Find the margin of error for the 95% confidence interval used to estimate the population proportion.
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