You intend to conduct a independence for a contingency table with 6 categories in the column variable and 3 categories in the row variable. You collect data from 102 subjects. What are the degrees of freedom for the x² distribution for this test? d.f. =

The midterm and final exam grades for a statistics course are provided in the data set below. Jaymes, a student in the class, scored 86 on both exams. Treat the given data sets as samples. Midterm: 80, 78, 85, 82, 79, 79, 78, 86, 80, 84, 78, 84, 80, 84, 81, 78, 81, 82, 78, 84 Final: 81, 88, 68, 69, 69 81, 82, 86, 76, 71, 72, 68, 77, 86, 68, 83, 84, 71, 81, 87 z-score for midterm: 1.857 z-score for final: 1.181 Based on the z-scores calculated above, which of Jaymes's grades is more unusual, the midterm grade or the final exam grade? Select the correct answer below: A. The absolute value of the z-score for the final exam grade is greater than for the midterm grade, so the final exam grade is more unusual. B. The absolute value of the z-score for the midterm exam grade is less than for the final grade, so the midterm grade is more unusual. C. The absolute value of the z-score for the midterm exam grade is greater than for the final grade, so the midterm grade is more…

the distribution of sample means consists of the

You need to use Stata to look up the dataset and its variables. Use Stata Companion Textbook. (Dataset: NES. Variables: spend8, [pw=nesw].) The NES dataset contains spend8, which records the number of government policy areas where respondents think spending should be increased. Scores range from 0 (the respondent does not want to increase spending on any of the policies) to 8 (the respondent wants to increase spending on all eight policies). The NES, of course, polls a random sample of U.S. adults. In this exercise you will analyze spend8 using the mean and lincom commands. You then will draw inferences about the population mean. (Remember to specify nesw as the probability weight.) The spend8 variable has a sample mean of ______. Make sure you use [pw=nesw] so your results are nationally representative. There is a probability of .95 that spend8’s true population mean falls between a score of ______ at the low end and a score of ______ at the high end. A student researcher…

when you have means from two different samples, it is best to conduct a what test?

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The boxplot below shows salaries for Construction workers and Teachers. Construction Teacher H 20 25 30 35 Salary (thousands of $) 40 They are making more than 1 45 50 If a person is making the first quartile salary for a construction worker, they are making more than what percentage of Teachers? % of Teachers. Q

When reading a problem, one must be aware of the sample size to determine if it is a Z-score or T-score problem. True or false

Consider a sample with data values of 7, 19, 8, 15, and 11. Compute the z-score for each of the five observations. z-score for 7 z-score for 19 z-score for 8 z-score for 15 z-score for 11 Need Help? Read It

Please also explain why you determined whether or not the results are statistically significant.  In another memory experiment, the mean scores for participants in Condition A and Condition B came out exactly the same!