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A survey of 34 students at the Wall College of Business showed the following majors:
Accounting 10Finance 5Info. Systems 3Management 6Marketing 10
Suppose you select a student and observe his or her major.
a. What is the probability he or she is a management major?b. Which concept of probability did you use to make this estimate?
A certain company relies heavily on phone orders. Suppose past records show that R% of all incoming phone calls to this company are orders from customers.
A study of elephants is conducted to determine the average weight of a certain subspecies of elephants. The standard deviation for the population is 500 pounds.
Draw the frequency polygon for these data using an initial class boundary of 21.5, an ending class boundary of 46.5 and 5 classes.
Take any number, square it, and add 6, multiply by the original number. Now add 5 to that. Now divide this by the original number plus 1. Now subtract your original number and you should get 5.
Average number of mosquitoes in pond is 80 per square meter with a standard deviation of 12. If 16 square meters are choses at random for a mosquiot count, find probabilty that the average of those counts is more than 83.0 mosquitoes per square me..
Working at Company X is very stressful for any human being. Medecines Sans Frontires stepped in to see if there is any possible violations of human rights at the notorious Company X.
Students are the University of New Harmony received 10, 000 course grades last semester. The table below breaks down these grades by which school of the university taught the course.
Historical data suggests a standard deviation in the first sample of 10 and a standard deviation in the second sample of 16. Find a 95% confidence interval for the population difference.
Can you conclude that every one-bedroom apartment costs less than every two-bedroom apartment? Which is more useful to someone planning to rent an apartment, the confidence interval or the significance test?
An independent financial advisor claims an average rate of return, μ, on a particular investment is at least 7%. In testing her claim, the correct pair of hypotheses is:
Suppose 3 high school students are randomly selected from different schools. What is the probability that all graduate?
Make a decision regarding the null hypothesis based on the sample information. Interpret the results of the test and state your conclusion.
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