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You have been asked to develop a study of the effects of watching Sesame Street on childrens' gender role orientations, intelligence, or sociability (select one).
(1) Describe how you would design the study using a preexperimental design (one shot case study, one group pretest-post test design, or static group comparison -- select one).
(2) Describe how you would design the study using a true experimental design (pretest-post test control group design, Solomon four-group design, or post test-only control group design -- select one).
For both of the designs you have to explain why you would select that design AND note how you would measure the dependent variable. Note the major advantage & weakness of each design in this particular study. Include 1 source of internal invalidity for each design & explain why you selected that one.
Critically discuss the difference between the standard deviation of the sampling distribution of the mean and the standard deviation of the sampling distribution of the median when we calculate the probability?
The superintendent of a printing plant has selected a random sample of 100 rolls of paper from a large shipment. The average length of the sample rolls is 416 feet, with a variance of 2704 feet.
Compute the sample variance and the sample standard deviation for these data (to 2 decimals).
Suppose you found that in doing the hypothesis test, you were able to reject the null hypothesis. What is the most appropriate conclusion to draw?
The probability is 90% that the sample percentage will be contained within what symmetrical limits of the population percentage?
Compute a 95% confidence interval for the mean difference in the percentage of bone loss between two groups.
He surveys several businesses and finds the standard deviation in monthly advertising costs is $23 for 12 hair salons, and $43 for 8 nail salons.
Compute the appropriate Test Statistic to test null hypothesis that mean of population is 4.3 against alternative hypothesis μ ≠ 4.3.
Use this information to determine the empirical probability that the next bird to visit the feeding station will be a dove.
In a simple linear regression analysis of 18 data points the following ANOVA table was found.
Explain finding value of test statistic and P-value also understand the result. At the .01 significance level can we compute that the mean fare has increased.
Simulate both one-and two-teller systems, calculate waiting time, average queue length, and percentage utilization for each system.
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