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In an early study, researchers at an Ivy University found that 33% of the freshmen had received at least one A in their first semester. Administrators are concerned that grade inflation has caused this percentage to increase. In a more recent study, of a random sample of 500 freshmen, 185 had at least one A in their first semester Calculate the appropriate test statistic to test the hypotheses related to the concern and test at 5% and 1%.
A sample of eight male professionals has an average yearly salary of $52,165. Find the average yearly salary for the 11 people.
Any person who is familiar with these trees understand the height of a California redwood tree which is related to another characteristics of the tree.
The table given below shows joint probability distribution of X and Y . Determine the covariance between the X and Y ?
Find the range, standard deviation, and variance for the scores.
Can we conclude a difference in voting patterns for men vs. women? YES or NO (circle one)
A class has 13 women and 18 men. If student if selected randomly, determine the probability student is a woman?
For which of given variables must a "two tail" t-test be applied?
At one excavation site 8641 pot shards have been found that not yet been cleaned and identified. What is the probability that:
Which of the following would have a binomial distribution and evaluate the binomial coefficient
Determine 80% confidence interval for average weights of Allen's hummingbirds in study regions. Determine the margin of error?
what percent of the total number of seeds germinated?
Is there a difference in the mean allowances nationally and the mean allowances in northwestern Ohio for nine-year-olds?
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