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Suppose that verbal scores on SAT exam have a normal distribution with a population mean 500 points and population standard deviation of 100. What is the probability that a randomly chosen makes at least 520 but no more than 610 and what is the 95th percentile of the SAT verbal scores?
Using the dataset, produce a graph of per capita GDP for Argentina, China, and Canada from 1965 to 1995. Is inequality between these countries increasing?
Computing the expected values for the given probability distribution and evaluate the expected values of the following probability distributions
Assume gasoline prices for a region are normally distributed. do the data you obtain provide enough evidence to reject the claim? use 1% level of significance.
Determine equation in point-intercept form for line that goes through points (8,-1) and (4,3).
A simple random sample of 6 recent graduates revealed the following information about their weekly incomes. What is the expected value of the average weekly income of all the recent graduates?
A study of 36 members of the Central Park Walkers showed that they could walk at an average rate of 2.6 miles per hour. The sample standard deviation is 0.4. Find the 95% confidence interval for the mean for all walkers.
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
For a t distribution with 16 degrees of freedom, find the area, or probability, in each region.
At the .05 significance level, is there a difference in the mean number of calls per day between the two employees?
Determine probability that student was sophomore? Determine the probability of selecting a face card from deck of 52 cards.
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
Determine the probability that person selected has blood type O? Given that person selected is a male, determine the probability that their blood type is AB?
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