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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.
Where S, A, and R are measured in dollars per week. Vanguard's marketing director is comfortable using parameter estimates that are statistically significant at the 10% level or better.
Draw a tree diagram depicting the sample space outcomes for this experiment.
Two mating parts have critical dimensions x1 and x2 as shown below. Assume that x1 and x2 are normally distributed with means 1 and mean2 and standard deviations s1 = 0.400 and s2 = 0.300.
Describe why the normal distribution can be used as an approximation to binomial distribution. What conditions should be met to use the normal distribution to approximate the binomial distribution? Why is a correction for continuity essential.
What is the probability of flipping a coin 6 times and getting 4 or more heads?
Crete a 90% confidence interval for mean Secchi dish measurement.
Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
(a) Compute the arithmetic mean of the subscribers' incomes. (b) Compute the modal and median incomes.
An educational study utilizes a simple pre post design to assess the efficacy of a computer tutor for solving inequalities.
Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits.
Develop a probability for the number of students in the sample who watch soap operas.
Compose a 350 to 700-word summary report of your findings to the researcher and owner of the restaurant in which you Identify evidence, if any, of the researcher's claim. Perform a one- or two-tail test on the data provided,
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