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You've been hired by the Dean of students at a local college. The dean wants to learn more about why students withdraw from their programs prior to completing their degrees. You develop the following.
J = the event that a student leaves the program because of competing job demands
F = the event that a student leaves the program because of competing family demands
Through your research you learn that the probability that the students leaves because of competing job demands is .25, the probability they leave because of competing family demands is .20 and the probability of both is .12.
What is the probability the student leaves for job or family reasons? Show the formula you used to arrive at your answer.
q1. you roll a single die numbered from 1 to 6 twice. what is the probability of rolling a six the first time and an
Assuming that colors are chosen independently of each other for inclusion in new fashions, what is the probability that the designer will be successful with at least one of her colors?
he length of time a person spends waiting in a physician's office for an appointment can be a frustrating experience. The results below are the responses of internists from two multispecialty group practices to the following question:
How many units would have to be sampled to be 95% confident that you can estimate the fraction of defective parts within 2% (using the information from today's sample--that is using the result that )?
A random sample of 15 snow mobiles was selected, and the lifetime (in months) of the batteries was measured. The variance of the sample was 8.6. Find the 90% confidence interval of the true variance and standard deviation.
What proportion of the customers will still have to wait more than 50 minutes if the variability in service times is the same as before?
Distinguish between the null hypothesis and the experimental hypothesis.- When analyzing data, why do researchers test the null hypothesis rather than the experimental hypothesis?
The mean time between reoccurring events is exponentially distributed with a mean time between events of 15 minutes.
What is the probability that all six carpenters selected will have their union card? Write a Solution Trail for this problem.
In this study, what was the independent and dependent variable? Describe the center of each distribution: What is the mean for each group?
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
Find that SAT scores correlate .45 with GPA for both Group X and Group Y. Would you conclude that the test was biased? Explain.
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