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A psychologist is studying the effect of drug and electroshock therapy on a subject's ability to solve simple tasks. The number of tasks completed in a 10-minute period is recorded for subjects who have been randomly assigned to compare four treatment groups: drug with electroshock, drug without electroshock, no drug with electroshock, and no drug/no electroshock. Sixty-four subjects were randomly selected students from a large local university. Presented are the results from an Analysis of Variance run on these data.
Write a short paragraph explaining to the psychologist what can be concluded from this output (assuming the technical conditions are met).
In this study we will consider the current issues of operational expenses in relation to the number of staff and number of branches being experienced by 123 Finance Inc.
Each of the given z-scores, draw the normal distribution and sketch the vertical line at location of z-score, then find out whether body is to right or the left of line and determine the proportion in the body.
State the alternate hypothesis for this study? What critical value should be used to determine the rejection region? Use the 1 proportion Z-test.
A local politician in this town has stated that the average property taxes are $1800 and most people do not pay more than this amount. Conduct a test at the alpha = .01 level to determine if this is true. For this test, consider a sample size of 3..
Sun Microsystems has approximately 50% of the high-end Unix machines market with its closest competitor being IBM. Suppose that 15 firms were in the market to purchase a high-end Unix machine. Assume that these firms listened to sales pitches by a..
Industry standards recommend that 9 percent of new vehicles need warranty service in the first year. Determine the probability that none of these vehicles needs warranty service?
Research question : At α = . 01, is degree of certainty independent of credits earned?
Suppose that, for a t test, your computed value for t is +3.28. The critical value of t is +2.048. Explain what this means. Do you reject the null hypothesis or not?
A researcher wants to determine a 95% confidence interval for the mean number of hours that UMKC students spend doing homework per week.
Consider a hypothesis test that uses a 0.05 significance level to test the claim that the mean body tem of the population is less than 98.6
Interpret values of b1, b2, b3 and b4 in this estimated regression equation.
Using the .05 significance level, can we conclude that there is a positive association between the two variables?
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