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1. Please describe a situation in which a correlation analysis or regression analysis could contribute to a better decision. The situation can be from a work, of general interest, or experienced in private life.
2. Please describe a situation in which correlation analysis or regression analysis can be (or was) misused to explain cause and effect relationship or a case of fortuitous correlation.
If a card is drawn at random from a standard 52-card deck, what is the probability that the card drawn is one of the following?
What are the endpoints of a 95 percent confidence interval for the proportion defective. (Round your answers to 3 decimal places).
If the company does not want to replace more than 5% of the televisions?
This morning the office you are monitoring has eight office visits on the schedule. What is the probability that
You're operating a business in very competitive market. You're not yet the dominant player, but you have invested heavily in marketing and product development and it has paid off with a steady growth rate of 10%.
Construct a 95% confidence interval for the difference in the proportions of women and men who have regular exercise programs.
Probability based on a random experiment - What is the probability of not randomly generating your cousin's telephone number?
Random sample of 64 services is selected. Assume the population consists of 400 services. Find out the standard error of mean.
A sample of 10 persons is used to measure the effectiveness of two massage techniques. The effectiveness of the techniques is measured by the number of days that pass by before the subjects feel the need for another massage session.
A teller can process an average of 100 customers per hour, which also can be modeled by a Poisson distribution. If there is one teller on duty, determine:
Lead-time demand is 600 pounds. The standard deviation of lead time demand is 52 pounds. Supposing the lead time demand is normally distributed and that an acceptable risk of stocking out is 4%:
the null hypothesis is to be tested at 95% confidence. Determine the critical value(s) for this test.
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