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Why are the t values listed in the df = infinity row of the t distribution table identical to the z values that correspond to the same right-tail areas of the standard normal distribution? What does this indicate about the relationship between the t and standard normal distributions?
in an examination of holiday spending known to be normally distributed of a sample of 16 holiday shoppers at a local
Suppose that the probability that a married man votes is 0.45, the probability a married woman votes is 0.4, and the probability a woman votes given that her husband does is 0.6. What is the probability that (a) both vote? (b) A man votes given th..
a standard deviation of 7.3 years. What is the 95% confidence interval estimate for the average number of years served by all Supreme Court justices?
If the interval of tiem between eruptions is normally distributed with standard deviation 21.25, then what is the probability that a randomly selected time interval between eruptions is longer than 95 minuntes.
Calculate the mean and standard deviation of the binomial distribution.- Using the binomial distribution tables, determine the probability that x will be exactly 8 homes heated with electricity.
a team of psychologists studying narcolepsy a sleep disorder characterized by sudden nodding off during the day decided
Kurt's Adventures, Inc. stock is quite cyclical. In a boom economy, the stock is expected to return 30% in comparison to 12% in a normal economy and a negative 20% in a recessionary period.
1 at what age do babies learn to crawl? does it take longer to learn in the winter when babies are often bundled in
At Ajax Spring Water, a half-liter bottle of soft drink is supposed to contain a mean of 520 ml. The filling process follows a normal distribution with a known process standard deviation of 4 ml.
As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. At = .05, what is the test value?
if a random variable can take on a measurable infinite number of values such as a persons weight height or temperature
Find out the probability distribution, and the cumulative probability distribution of car arrivals.
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