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Find the most appropriate statistical procedure:
a. Teacher of low-level reading group interested in average score for group of 25 students?
b. Administrator wants to find out if relationship between teacher absences and student achievement exists?
c. Math teacher wants to know how many groups should be formed within a class of 30 students?
d. Teacher is interested in finding the number of students who rate his performance as good, excellent, average, or poor.
Identify scale of measurement
a. Attitudes toward school
b. grouping students based on hair color
c. asking judges to rank students from most cooperative to least cooperative
A professor wants to determine if his class' anxiety decreases over the course of the semester. He uses a test to measure a random sample of all students enrolled at midterm and again at the end of the course.
Second treatment had M = 52 with s^2 = 36. Do these data point to significant difference between two treatments? Use the two-tailed test with α = .05.
Draw a scatter diagram. Based on the scatter diagram, does there appear to be any relationship between the number assemblers and production? Explain.
The Stroop task is when color words are printed in the wrong color; for example, the word red might be printed in the color blue.
Compute the incidence proportion or the risk ratio that compares group 1 to group 0, and compute the Incidence proportion or the risk ratio which compares group 2 to group 0. Then post a summary of your findings.
You are asked to conduct a study to determine if gender has any bearing on the choice of a dog or cat as a pet. You take a random sample of 350 adults and ask each what kind of pet they would prefer, a dog or a cat?
Assume that 12 percent of adults in this country have filed for bankruptcy at some point in their life.
Let Z be the random variable giving the number of times the second biased coin (coin #2) comes up heads. What is the probability mass function of Z? What is the mean and variance of Z?
Discuss the assumptions of this model. Specifically, how does each variable affect demand? How do the variables influence each other? What limitations might this model have? How can it be improved?
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..
In a batch of 8,000 clock radios 9% are defective. A sample of 15 clock radios is randomly selected without replacement from the 8,000 and tested.
Which combination of factors has greatest likelihood of rejecting null hypothesis?
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