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Question: According to a survey published by ComPsych Corp. 54% of all workers read email while they are talking on the phone. Suppose that 20% of those who read email while they are on the phone write personal "to Do lists during meetings. Assuming that these figures are true for all workers, if a worker is randomly selected determine the following probabilities:
A. The worker reads email while talking on the phone and writes personal "to do " lists during meetings.
B. The worker does write personal "to do " lists given that he reads emails while talking on the phone.
C. The worker does not write personal "to do" lists and does read email while talking on the phone.
What are examples of variables that follow a binomial probability distribution? What are examples of variables that follow a Poisson distribution? When might you use a geometric probability?
Construct the 95% confidence interval estimate of the mean number of migraine attacks for those treated with acupuncture.
Systolic blood pressure are mesaured at baseline and again 4 weeks later. Computed 95% confidence interval for the mean difference in blood pressure over 4 weeks.
Sstandard deviation was found to be 3.3 minutes. Is there evidence to reject the manager's claim at alpha =.02? Perform an appropriate hypothesis test.
question 1 an accelerated life test on a large number of batteries revealed that the mean life for a particular use
What is the shape of a frequency distribution with an arithmetic mean of 12,000 pounds, a median of 12,000 pounds, and a mode of 12,000 pounds ?
A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.
Hamburger Joe's sells the best burgers in town. The variable unit cost for making one burger is $.97. The fixed cost of making burgers for 12 months will be a total of: $140,000.
The incarceration rate in one nation's prisons was 965 per 100,000 male residents, and 65 per 100,000 female residents.
Suppose the waiting time at a restaurant is normally distributed with a mean of 12 minutes and a standard deviation of 6 minutes.
Suppose the paper cannot support the fixed expenses of a full-production setup if the circulation drops below 321,000. If the probability of this event occurring is low, the production manager might try to keep the full crew in place and not disru..
To check this theory, 20 invoices are randomly selected and 5 are found to have errors. What is the probability that of the 20 invoices written, five or more would contain errors if the theory is valid?
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