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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?
Suppose also that the mean score on test A is 85, and the standard deviation is 10; the mean score on test B is 90, and the standard deviation is 16; the scores on the two tests have a bivariate normal distribution; and the correlation of the two ..
Create a scatter plot for those data. Based on scatter plot, how would you explain relationship between the two variable.
Evolutionary theories often, Emphasize that humans have adapted to their physical environment. One such theory hypothesis that:
Write down a paragraph about the normal distribution. In the paragraph give an example of a distribution that you would judge to be nearly normal and explain why you have made that conclusion.
Explain these results to a person who understands the t test for a single sample but knows nothing about the t test for independent means.
How many voters required to be sampled to evaluate the proportion within 0.05 with 95% confidence?
A review of voter registration records in a small town yielded the following table of the number of males and females registered as Democrat, Republican, or some other affiliation.
It has been estimated that 30% of all farms are family-owned. In a sample of 12 farms, what is the probability that exactly three farms are family owned?
Statewide real estate sales agency, Farm Associates, specializes in selling farm property in state of Nebraska. At.10 significance level, has there been an increase in selling time?
The Absent Minded Professor study was a RCT, which had an objective to estimate the protective effect of drug "No-Reminder" compared to drug "Reminder" on risk of "Forgetful syndrome". The study found that the drug "No-Reminder" was protective.
At the .05 significance level, can she conclude that there is a difference in the mean amount of weight loss among the three diets?
Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
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