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1. Colleges conduct student evaluations of instruction to determine if there are patterns of either excellence or the lack thereof by their instructors. These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below (5 is agree strongly to 1 is disagree strongly) for the statement "The instructor is an excellent teacher."
The P-value for the χ2 test isA. more than 0.10.B. between 0.05 and 0.10.C. less than 0.05.
2. Colleges conduct student evaluations of instruction to determine if there are patterns of either excellence or the lack thereof by their instructors. These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below (5 is agree strongly to 1 is disagree strongly) for the statement "The instructor is an excellent teacher."
In a test of no association between these variables, we are really studying a model ofA. independence.B. comparing several populations.C. Neither choice is correct.
3. We are interested in comparing the proportions of males and females who think earning a large salary is very important to them. I surveyed 200 of each gender and recorded their answers to the question as "yes" or "no." If I analyze the data with both a z test for two proportions and a χ2 test of no association, the P-value for the z testA. will be less than for the χ2 test.B. will be the same as for the χ2 test.C. will be more than for the χ2 test.
State the values of the coefficient of correlation and coefficient of determination correct to three decimal places
Answer all of these questions using R Commander. Include all graphs, outputs from R Commander.
Suppose we wish to test the null hypothesis that there are no differences among the proportion of men and women who developed a rash. Evaluate the P-value of the chi-square test of this hypothesis.
The null hypothesis is that the distribution of mother's educational level is the same for both treatment groups. The value of the chi-square statistic is 7.422. Evaluate the P-value
MATH1550H: Assignment: Question: Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form
The 50 members of the placebo group had blood pressure lowered by an average of 15 points with standard deviation 8 points. To analyze this information we will use a, When testing whether or not the increases in spending are different, the test is ..
Caselet on McDonald’s vs. Burger King - Waiting time
A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random.
Find the relative risk for moderate beer drinkers as compared to nondrinkers, finds the 95% confidence interval
Write introduction to SPC (STATISTICAL PROCESS CONTROL)? Describe the use of SPC tools used at D2D?
Which of the following statements is consistent with the scatterplot
Determine whether the method of delivering teaching influences adherence with antiretroviral therapy.
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