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1. For the following exercise, complete the following:
a. Find the mean, median, and range for each of the two data sets.
b. Find the standard deviation using the rule of thumb for each of the data sets.
c. Compare the two sets and describe what you discover.
The following data sets shows the ages of the first seven presidents (President Washington through President Jackson) and the seven most recent presidents including President Obama. Age is given at time of inauguration.
First 7: 57 61 57 57 58 57 61
Second 7: 61 52 69 64 46 54 47
Say, for example, the correlation is 0.75 between Height (measured in inches) and Weight (measured in pounds). If Height were changed to being measured in centimeters (where 1 inch = 2.54 centimeters) what effect would this have on the correlation..
An averages of four tax evaders per 100 tax filers. If 50 tax filers are randomly selected from the state, what is the probability of the following:
What is the probability of either X or Y occurring? What is the probability that neither X nor Y will happen?
Compute the Pearson correlation. Multiply each X value by 2 and compute the Pearson correlation for the modified scores.
The probability that home sales will increase in the next 6 months is 0.25. The probability that the interest rates on loans will go up in the same period is estimated to be 0.74.
The first and third quartiles were 17.95 and 35.45 miles per gallon, respectively, Develop a box plot and comment on the distribution. Is it a Symmetric distribution?
Extrapolating this data by using the sum of squares method would further reveal any discretionary variances in relationship to the mean?
In the Cash Now lottery game there are 10 finalists who submitted entry tickets on time. From these 10 tickets three grand prize winners will be drawn.
If you select a random sample of 100 voters, what is the probability that a candidate will be forecast as the winner when. The true percentage of her vote is 50.1%?
Compute the difference scores for following data from repeated-measures study.
Show the sampling distribution of line over x where line over x is the sample mean annual cost of automobile insurance.
What happens to the confidence interval when we go from a 95% confidence level to a 99% confidence level? Is this desirable? When would we want to use a 99% confidence interval?
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