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Q1) You read in the NY Times that students at MSU take an average of 4 classes per semester. However, you conducted a survey in your Research Methods class and found that your sample of 100 MSU students took an average of 3.2 classes per semester (with a sample standard deviation of 1.7 classes). Is your sample of MSU students significantly different from the population of MSU students in terms of the number of classes they take per semester (use alpha level .05)? To answer this question, follow all of your steps for hypothesis testing.
Suppose that you select a 50 families sample. Which is the form expected from the distribution of the average or median of the sample?
Experience has shown that radon gas level is approximately normally distributed for this population.
Determine the event that the sum of the numbers falling uppermost is less than or equal to 7
The weight of a product is normally distributed with a standard deviation of .5 ounces. What should the average weight be if the production manager wants no more than 5 percent of the products to weight more than 5.10 ounces.
What is the sample space for this process and evaluate the variance of the intelligence scores
Categorize the events as dependent or independent. Events A and B where P (A) = 0.7, P (B) = 0.8, and P (A and B) = 0.56.
The probabilities of low, medium and high compliance are 0.3, 0.4, and 0.3, respectively
What does confidence interval tell you? What does it mean? What 2 things can a researcher do to decrease width of a confidence interval? What are the effects?
In testing equality of two means below, determine the test statistic? (Use the equal variances formula)
To estimate the mean of the population from sample information, we need to calculate the standard deviation of the distribution of the sample means around the population mean.
What is the null hypothesis? Use α =0.05. Compute critical value. Use α =0.05.
One approach would be to contact every psychology graduate student you know and ask them to fill out a questionnaire about it.
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