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Suppose the probability distribution X= number of jobs held during the past year for students at HFCC is as follows:
x = 0 1 2 3 4
p(x)= .14 .37 .29 .15 .05
A. Find the probability that a randomly selected student held two or few jobs during the past year.
For the following, describe the target population, sampling frame, sampling unit and observation unit. Is there any selection bias or inaccuracy of responses?
The sample results are given below. At the 0.10 significance level, test the claim that response and major are independent.
Choose the proper conclusion regarding the claim that the population have different variances.
Card holders should be sampled to meet the original requirements of the sample. Then explain the trade-offs that will occur when you lower the sample to $10,000 to meet their budget.
Find out the probability distribution of your net winnings if you play one time. Calculate the mean and the standard deviation.
One variable recorded is the count X of finish defects (dimples, ripples, etc) in the car's paint. Is it reasonable to use a binomial distribution?
The Director of Emergency Medicine at Big Mountain Medical Services is studying patient waiting time. Waiting time is defined as the time from when a patient enters the facility until seen by a physician.
How many Corolla buyers must be surveyed if we want to be 95% confident that the sample percentage is within four percentage points of the true percent all Corolla buyers?
The weight of a product is normally distributed with a standard deviation of .5 ounces. What should the average weight be if the production manager wants no more than 5 percent of the products to weight more than 5.10 ounces.
A study describes operating costs for comparable manufacturing plants operating in 15 different U.S. metropolitan areas. From the costs obtained in the study, the following multiple regression equation was developed:
Same survey showed that average length of time each store was in bbusiness is 6 years, with standard deviation of 25 years. Which is more variable, number of magazines or number of years.
"Suppose that we conducted a survey in which we asked 800 people the following question: "In the event of an emergency, would you seek medical assistance at the emergency room of our hospital?"
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