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The data below was obtained for the years 1993 through 1998 and indicate the number of fireworks (in millions) used and the related injuries. Predict the number of injuries (provided there is a significant relationship) if 100 million fireworks are used during a given year.
Number of fireworks in use x 67.6 87.1 117 115 118 113Related injuries y 12,100 12,600 12,500 10,900 7,800 7,000
Do a complete regression analysis by performing the steps below. Note: No regression should be done when r is not significant.
a.Draw a scatter plot.b.Compute the correlation coefficient.c.State the hypotheses.d.Test the hypotheses at .e.Determine the regression line equation (if applicable).f.Plot the regression line on the scatter plot (if applicable).g.Summarize the results.
The annual returns, in percentages, on stocks A and B for three possible states of the economy are given in the table below.
Standard deviation of the sampling distribution of sample proportion is 0.025. However, the report did not indicate what the sample size n was. What was it?
If there are 20 people in the room, 12 men and 8 women, what is the probability of picking two people, without replacement, getting a woman on the first and a man on the second?
Carefully define a standard normal distribution. Why does a researcher want to go from a normal distribution to a standard normal distribution? Explain.
Find the critical value and test statistic value follows normal distribution.
A loan application is received this morning. What is the probability that:
In the study of fingerprints, an important quantitative characteristic is the total ridge count for the 10 fingers of the individual.
An olympic archer is able to hit the bull's-eye 70% of the time. Assume each shot is independent of the others. If she shoots 6 arrows, what is the probablitly that she never misses?
What is a point estimate of the P/E ratio for the population of stocks listed on the New York Stock Exchange? Develop a 95% confidence interval.
Excess postexercise oxygen consumption (EPOC) describes the energy expended during the body's recovery period immediately following aerobic exercise.
A company adminsters an "aptitude test for managers" to aid in selecting new management trainees. Prior experience suggests that 60 percent of all applicants for management trainee positions would be successful if they were hired.
The student newspaper on our campus was interested in binge drinking. For their article, they surveyed 50 fraternity members, and found they drink more than 5 drinks an average of 7 times per month.
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