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Complete the following:
a. Select a variable. Compare the mean of the variable for a sample of 30 for one group with the mean of the variable for a sample of 30 for a second group. Use a z test.
b. Select a variable. Compare the mean of the variable for a sample of 10 for one group with the mean of the variable for a sample of 10 for a second group. Use a t test.
c. Select a variable that will enable you to compare proportions of two groups. Use sample sizes of at least 30. Use the z test for proportions.
You may obtain raw data from the random number table in the appendix section of your text or from any other sources, including sources on the World Wide Web.
You took a sample of your expenses for 20 weeks and found that the average is $285 and the standard deviation for the sample is $25. Set up your null and alternative hypothesis for testing whether your cists are different and do the analysis using..
However, 2% of the Dallas clocks are defective. If you go shopping and buy a clock from this company, what is the probability that you buy a defective clock?
An independent researcher has decided to study variations in TV viewing habits among three American cities. She has managed to randomly sample households in Chicago, Atlanta, and Minneapolis and gather data on the daily "on" times for households o..
A random sample of 8 petrol stations in each of three European countries A, B and C was taken. The price per litre at each station was recorded in Euros. The prices are given below.
If the standard deviation is 4.09, how large a sample is needed to get the desired information to be accurate within 0.53 decibels? Show all work.
At.01 significance level, is there difference in mean number of times men and women order take-out dinners in month? Determine the p -value?
Within each of your current careers/ jobs, there are sets of data that can be analyzed. For example, a teacher can use a set of test scores, a dietician can analyze a set of patient weights and correlate them to incidences of diabetes, and a sales..
Find the slope and vertical axis intercept of the linear function
In total, of 1000 applications they got from men, they hired 625, or 62.5%. Based on numbers presented, what do you believe of the discrimination claim?
If the researcher used an independent-measures design, then how many individuals were needed for the study and what are the df values for the F ratio?
From Group of 40 People, a jury of 12 people is selected. In how many various ways can a jury of 12 people be selected?
What was the success probability of each O-ring?
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