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A system consists of 4 identical components, where at least 3 components need to work for the system to work. Each component has an equally likely chance of failing or working. Let X be the number of components that are failed.
1. Find the probability distribution for X and display it in a table.
2. Find the mean and the variance of the probability distribution for X.
3. What is the probability that the system fails?
A decade-old study found that the proportion of high school seniors who felt that "getting rich" was an important personal goal was 67%.
write an essay that explores some of the statistical data that has been found in this area of study pertaining to the
the following partial minitab printout of a regression analysis where x is the length in centimeters and y is the
out of 2430 mlb games played in 2009 the home team won the game in 54.9 of the games. test to see if there is evidence
a simple random sample of 50 adults is obtained and each persons red blood cell count is measured. the sample mean is
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
An elevator has a uniform distribution ranging from 0 to 4 minutes a) find the mean and standard deviation of x, the time a customer on the second floor waits for an elevator.
Set up a scatter diagram. Use the least-squares method to find the regression coefficients and State the regression equation.
scientists at the hopkins memorial forest in western massachusetts have been collecting meteorological and environ-
Compute a 90% confidence interval for the population mean, based on the sample 25, 27, 23, 24, 25, 24, and 59. Change the number from 59 to 24 and recalculate the confidence interval.
Finds that their mean travel time is = 22.5 minutes. What are the null and alternative hypotheses for testing whether the true mean is different from 20 minutes?
Determine the probability that mean height of random sample of 100 women is greater than 66 inches?
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