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The average age of doctors in a certain hospital is 45 years old . Suppose the distribution of ages is normal and has a standard deviation of 6 years. If 16 doctors are chosen at random for a committee find the probability that the average age of those doctors is less than 45.45 years.
Find a 96% confidence interval for the true percentage of all households that have central air conditioning. Write a sentence that interprets this interval.
A rare disease has just broken out. Doctor Johnson is trying to help, but while treating patients he might expose himself to the disease.
Observations are taken on net revenue from sales of Hughes, HNS, and satellite services to see if offering rebates is beneficial for the organization.
Find Probability of independent events.Consider again the auto repair rates described. If you own two cars, what is the probability that.
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
A standard deviation of 1.5. The distribution is normal. What proportion of faculty consume an amount between 4 and 6 cups?
when an opinion poll calls residential telephone numbers at random only 20 of the calls reach a live person. you watch
it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence and comment on your results.
owner of a store that sells cds wants to estimate the mean amount of time a customer remains in the store. a random
Mean of 61 minutes and a standard deviation of 9 minutes. Find the proportion of runners who take more than 70 minutes to finish. Draw a sketch to show this proportion.
Suppose you are on a test and are asked to determine whether the given experiment is binomial, Poisson, or neither. What are you going to think about to determine which test to use. Do you have a checklist? How would you approach this problem?
question 1according to a recent survey the average urban person consumes 1.5 kg of food per day. is this figure also
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