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A random sample of 36 automobiles was taken, find the probability that the average fuel tank capacity was higher than 75 liters, the probability that the average fuel tank capacity equals 75 liters and the probability that a randomly selected fuel tank had a fuel capacity less than 75 liters.
we are interested in testing whether the standard deviation of a population 1 is significantly greater than the
If you want to be 95?% confident of estimating the population mean to within a sampling error of ± 33 and the standard deviation is assumed to be 19
Two colored dice are tossed. What is the probability that the sum of the numbers shown on the upper faces is equal to 7?
How many cities have a population of at least 25,000 but less than 500,000?- How many cities have a population less than 250,000?
1. use a scatterplot and the linear correlation coefficient r to determine whether there is a correlation between the
A company has large production centres in two towns. The table below represents the distribution of weekly pay of the full-time production staff at these two centres:
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suppose x has density function 3x-4 for x is greater than or equal to 1.a find a function g so that gx is uniform on
Given that Z is a standard normal random variable. What is the value of Z if the area to the left of Z is 0.9382?
Estimate the average score at age 35 for all the individuals who scored 115 at age 18. Predict the score at age 35 for an individual who scored 115 at age 18.
consider n independent flips of a coin having probability p of landing on heads. say that a changeover occurs whenever
1. the maker of a shampoo knows that customers like this product to have a lot of foam. ten sample bottles of the
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