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Question: a. What, in general, is a test statistic?
b. Which test statistic would you use for a two-sided t-test?
c. What, in general, is a critical value?
d. Which critical value would you use for a two-sided t-test?
The response must be typed, single spaced, must be in times new roman font (size 12) and must follow the APA format.
Given that the person uses trails daily, what is the probability that she uses the trails for commuting?- If the person uses trails daily, what is the probability that he does not use the trial for commuting?
Generate a vector x = (x1,..., x10,000) con- sisting of 10,000 random standard Normals. Let y = (y1,..., y10,000) where yi = exi . Draw a histogram of y and compare it to the pdf you found in part (a).
The correlation between IQ and the verbal SAT score among the seniors at GWB High School is .90; it is significant. The mean IQ is 100 with a standard deviation of 10.
Worldwide golf ball sales total more than $1 billion annually. One reason for such a large number of golf ball purchases is that golfers lose.
Based on eight universities in each of two different regions, is there a difference between university rankings based on their regional locations? Perform a Mann-Whitney U test, being sure to follow the directions under the table.
question a small stock brokerage firm wants to determine the average daily sales in dollars of stocks to their clients.
a. Plot each of the above series and comment on the respective trend.
the distribution of heights of adult men in the u.s. is approximately normal with mean 69 inches and standard deviation
How Large a sample is needed to estimate the true proportion of homeowners who have vegetable gardens to within 3 percentage point 92% confidence.
Drawing on one of your interests in the study of criminal justice, develop three hypotheses that can be tested using t-tests. Why do you think it would be interesting or important to test these hypotheses?
Based on the evidence from these samples, can you conclude that the distributions of favorite forms of camping are different for at least two of the regions?
Lightbulbs manufactured by a particular company have an exponentially distributed life with mean 100 hours.
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