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John conducted his study to measure self-esteem among victims of domestic violence before and after they complete an 8-week program for abuse victims with 10 individuals. He calculated t = 1.9 from his data. He had a directional hypothesis (i.e., self-esteem would be higher after attending the program). Write up the summary of his results and his conclusion regarding his hypothesis. Mark replicated John's experiment in every way except he used 100 women in his study. He also calculated t = 1.9 from his data. He also had the same directional hypothesis. Write up the summary of his results and his conclusion regarding his hypothesis. What observations would you make from the findings of these two studies?
Indicate which would be the independent variable and which would be the dependent variable in each of the following:
A portfolio p of consisting 60% of stock X and 40% of stock Y, has a correlation ρpM = 0.62 with the market. What is the portfolio volatility? Statement on the diversification effect.
Study is conducted as to whether there is relationship between joggers and consumption of nutritional supplements.
With this information, by constructing a 2 by 2 table, compute the predicative value positive and predictive value negative of the ELA in hypothetical population of 1000000 blood donors.
Students are the University of New Harmony received 10, 000 course grades last semester. The table below breaks down these grades by which school of the university taught the course.
A random sample of 15 paired observations has a correlation of -.46. Can we conclude that the correlation in the population is less than zero? Use the .05 significance level.
Finding the probability of each event in a group of events of different possibility
How many voters required to be sampled to evaluate the proportion within 0.05 with 95% confidence?
At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pounds?
The researcher expects a 12-point treatment effect and plans to use a two-tailed hypothesis test with a = 0.05.
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
What factors might cause the company to order a larger or smaller amount than the EOQ?
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