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A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4 kilometers per litre with a standard deviation of 2.3 kilometers per litre.
A. Assuming that the kilometers per litre given by all mid-sized cars have a normal distribution, find a 99% confidence interval for the population mean μ.
B. Suppose the confidence interval obtained in (a) is too wide. How can the width of this interval be reduced? Describe all possible alternatives. Which alternative is the best and why?
Calculated the probability of observing a sample proportion of voters 0.55 or higher supporting the incumbent governor.
a new brand of chocolate bar is being market tested. four hundred of the new chocolate bars were given to consumers to
Given that a respondent is over age 50, what is the probability that he or she gets news primarily from newspapers?
What is the maximum likelihood estimator of μ1 - μ2? Construct a 99% con?dence interval for μ1 - μ2.
An organization has N employees where N is a large number. Each employee has one of three possible job classi?cations and changes classi?cations (independently) according to a Markov chain with transition probabilities
Adult US women are known to have cholesterol levels that are N(189 mg/dL, 25 mg/dL). What % of US women would you expect to have cholesterol levels below 135?
abc university administration has hired your group as business consultants to determine whether the university should
Normal with a standard deviation of 0.3 inch. How does the diameter of an orange at the 67th percentile compare with the mean diameter?
In a recent year, the FCC reported that the mean wait for repairs for AT&T customers was 25.3 hours. In an effort to improve this service, suppose that a new repair service process was developed.
to investigate the maternal behavior of laboratory rats we move the rat pup a fixed distance from the mother and record
Obtain a 98% con?dence interval for the mean amount of water consumed.
you conducted a chi-square goodness of fit test in your asci 691 capstone project. unfortunately you did not get the
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