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A discrete random variable, X, takes on the values 15, 150, 725, and 4,600, with probabilities 0.70, 0.15, 0.10, 0.05, respectively. Use the statistical capacity of your calculator to find the standard deviation of the random variable, X, rounded to two decimal places.
Assume a researcher compared the performance of four independent groups of participants on an ordinal variable using the Kruskal-Wallis H test.
Nestling mass and nest humidity. Researchers investigated the relationship between nestling mass, measured in grams, and nest humidity index, measured as the ratio of total mass of water in the nest divided by nest dry mass, for two different grou..
If the restaurant stocks 400 hamburgers and 150 chicken sandwiches for a given day, what is the probability that it will run out of hamburgers or chicken sandwiches (or both) that day? Assume that the demand for hamburgers and the demand for chick..
How did you find or collect your data? (If you found the data, give a clear reference. If you collected the data, describe clearly the data collection process you used.)
The company obtains a random sample of 165 claims and finds x‾ = $16,530 and s = $5,542. Give a 95% confidence interval and a 99% confidence interval for the average amount of a claim.
a quality control inspector will sample products obtained from a manufacturing process until two noncomforing products
At the .01 level of significance, is the true mean greater than 10?
Is there sufficient evidence to reject the claim that the mean annual income of teachers in state of Utah is greater than or equal to the mean annual income of teachers in Oregon? Perform a one-tailed test.
Prove that these vectors are affine independent if and only if none of them is a convex combination of the other two.
The sample mean was x=4.05 mm, and the sample standard deviation was s= 0.08 mm. Find a 95% lower confidence bound for mean wall thickness. Interpret the interval you obtained.
A study found that the mean amount of time cars spent in? drive-throughs of a certain? fast-food restaurant was 156.3 seconds.
Given that both balls selected are white what is the probability that bowl 3 was selected?
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