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In a study to investigate the effect of the color paper (blue, green, orange) on response rates for questionnaires distributed by the "windshield method" in supermarket parking lots, four supermarket parking lots were chosen in a metropolitan area and 10 questionnaires of each color were assigned at random to cars in the parking lots.
a. Is this study experimental, observational, or mixed? Why?
b. Identify all factors, factor levels, and factor-level combinations.
c. What type of study design is being implemented here? Completely randomized, randomized complete block, nested designs, repeated measures? explain
d. What is the basic unit of study?
A drawer contains 11 identical red socks, and 8 identical black socks. Suppose that you choose 2 socks at random in the dark
A biology professor claimed that the proportions of grades in his classes are the same. A sample of 100 students showed the following frequencies:
The point estimate for the difference between the proportions is:
At a probability of type 1 error of 0.05, test the claim that the assistant professors earn more than $42000 per year. the standard deviation of the population is $5230.
Develop three regression models to predict the selling price based upon each of the other factors individually. Which of these is best?
Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments from "The Collection from the Best of Classical Music."
Given the data set body-weight.sav, use SPSS to calculate the 90%, 95% and 99% confidence intervals for the mean of the variable weight.
What formula would I use? Can you break it down into baby steps so I can understand how you got the answer?
Formulating null and alternative hypothesis to test the claim averaging about $5000.
Compute a two-sided 90% confidence Interval estimate for µd.
A survey of 51 randomly selected students finds that on average students study 138 minutes per night with a standard deviation of 32 minutes. What conclusion can be made from this data?
question a soccer ball is kicked at a speed of 25.0 mph with an angle of 30 degrees above ground. find the maximum
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