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Gas Station pump signs, at one chain, encourage customers to have their oil checked, claiming that one out of every four cars should have its oil topped.
a.) What is the probability that exactly 3 of the next 10 cars entering a station should have their oil topped?
b.) What is the probabily that at least half of the next 20 cars entering a station should have their oil topped?
Be sure to include information about how you would use the concept of probabilities to apply to profiles for hiring more satisfied individuals.
Construct the 95% confidence interval estimate of the mean number of migraine attacks for those treated with acupuncture.
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
The researchers planned to use simple linear regression to see if the age at which a baby was first able to crawl could be predicted from the average outdoor temperature six months after each baby's birthdate.
You read a report that says, "On the basis of the simple random sample of 100 high school seniors that took the SATM test this year, a confidence interval for µ is found to be 512.00 ± 25.76." What was the confidence level used to calculate this..
A stock price is currently $100. Over each of the next two three-month periods it is expected to increase by 10% or fall by 10%. Consider a six-month European call option with a strike price of $105.
A major problem resulting from the lack of randomization in a cohort study is: the possibility that a factor that led to the exposure, rather than the exposure itself, might have caused the disease.
You are given an annual time series with 40 consecutive values and asked to fit a fifth-order autoregressive model.
The condition for the question is that the deck of cards has 52 cards and among them are 12 face cards. What is the probability of choosing 6 face cards out of 8 chosen. Thru Binomial distribution holds( meaning with replacement)
A researcher wants to estimate the average time (in minutes) spent in a car daily. This will be done by randomly surveying 300 individuals and calculating the sample mean.
Describe a research problem that would benefit from Factor Analysis. What are the variables and what would you hope to achieve?
The owner of a small computer store personally sells one computer per week on the average. Use the Poisson distribution to find the probability of randomly selecting a week in which she personally sold three computers.
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