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Let X be a random variable representing the time between successive arrivals at a checkout counter in a supermarket. The values of X in minutes (rounded to the nearest minute) are
1 2 3 7 11 4 1312 7 3 2 11 7 2
Assume that the pdf of X is f(x) = (1/θ)e-(x/θ). Use these data to ?nd MLE θˆ. How can you use this estimate you have just derived?
find the following probabilities for the standard normal random variable z. we are suppose to use the z table but i am
find the 95 confidence interval for the variance of the weights of containers of motor oil if a sample of 14 containers
An engineer was interested in comparing the variability of the power of a laser at current levels of 16 amps (X) and 20 amps (Y). To do so, random samples of 25 observations of power readings were obtained at each current level. The samples ..
What regression equation would you want to do for banking? Give the y and x variables. Explain why this would be important to know.
public health officials claim that people living in low income neighborhoods have different physical activity levels
1) What is the purpose of calculating a test statistic? How does this value describe how the sample data either supports or contradicts a claim?
The grades on the midterm given in a large managerial stats class are normally distibuted with mean 75 and standard deviation 9. Instructors of this class wants to assign an A to top
What percent of the investment firm's potential market sees and remembers the advertisement? What percent of the investment firm's potential market sees, but does not remember the advertisement?
What are the mean and standard deviation of the sample proportion who are at least 75 years of age in samples of 250 respondents?
Sat verbal scores are normally distributed with a mean of 426 and a standard deviation of 94. Use the Empirical Rule to determine what percent of the scores lie between 332 and 426.
how would you as a researcher and public health professional convince someone who is skeptical about research results
in a random sample of 400 minnesota residents 330 have home internet access whereas in a random sample of 900 wisconsin
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