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1. The following information refers to the next two questions:The manager of a service station is in the process of analyzing the number of times car owners change the oil in their cars. She believes that the average motorist changes his or her car's oil less frequently than recommended by the owner's manual (two times per year). In a preliminary survey she asked 15 car owners how many times they changed their car's oil in the last 12 months. The results are listed below.1 1 2 1 22 0 1 0 12 3 1 3 0QUESTION 14The value of the test statistic in this problem is approximately equal to __________?
Using the appropriate statistical procedure on the SPSS, test the between group means for a significant difference.
Test the claim at alpha-.05 that the average wage has not changed by finding the p-value for the test.
Determine a 90% confidence interval on difference in mean number of production units for two shifts. Compute 99% confidence interval for part A.
Based on this, what is the probability that the mean weight of the bales in a sample of n=64 bales will be between 78 and 82 pounds?
Determine the coefficient of correlation between the two variables. Interpret the value.
64% of men consider themselves professional baseball fans. You randomly select 10 men and ask each if he considers himself a professional baseball fan.
Given that Z is a standard normal random variable. What is the value of Z if the area to the left of Z is 0.9382?
The mean of a set of 7 numbers is 13. What is the sum of the numbers? Find the mode of the following test scores: 89, 78, 91, 82, 75, 89, 84, 95, 89, 93
Investigate the comparative pros and cons of the mean and the median. Find examples where the mean is more appropriate than the median and vice-versa. Discuss the locations of the mean, median and mode for a normal, left-skewed and right-skewed di..
The two cars drove a combined total of 1450 miles, and the sum of their fuel efficiencies was 40 miles per gallon. What were the fuel efficiencies of each of the cars that week?
San francisco also reported that a scientific polling organization found that new zealanders favor the law by a margin of 56.4% to 39.3%. Explain why the two polls can give such widely differing results and which poll is likely to be more reliable..
A researcher claims the average American drinks 52 gallons of cola per year with a population standard deviation of 2.0 gallons. We sample 25 random people and find the mean yearly consumption was 49 gallons.
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