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Scores of high school students on a national mathematics exam in Egypt were normally distributed with a mean of 86 and a standard deviation of 4. What is the probability that a randomly selected student will have a score of 80 or higher? If there were 97,680 students with scores higher than 91, how many students took the test?
Surface area of a cube. The formula A = 6V^-2/3(-2/3 power) gives the surface area of a cube in the volume V. What is the volume of a cube with a surface area 12 square feet?
I understand how to do a time series graph with one variable versus time in years, but I am not sure how to graph if the time is in months with more than one variable with a scatter plot.
Imagine that these results are disseminated to the general public through publication and media coverage. Write about one possible harmful consequence that these conclusions could have in the "everyday" world.
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a test of sample means or sample proporti..
Compute and interpret each of the statistics in parts(a) through (f) Mean and Median.
From these we calculate = 129.44; = 122.65; sx = 9.15; sy = 11.02. Perform the test H0: against the alternative H1:, using the two sample t-test, and state any assumptions you may require to do this test.
Standard deviation of 1.8 years, and the distribution is approximately normal. if an employee is picked at random, what is the probability that the employee has worked at the store for over 10 years?
Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb.
Derive the formula for the entropy of an ideal monoatomic gas using the microcanonical ensemble. This formula is known as the Sackur-Tetrode equation.
Find the probability that in a given year a) exactly one major hurricane will strike the U.S. mainland, b) at most one major hurricane will strike the U.S. mainland.
A representative of the environmental protection agency (EPA) wants to select samples from 10 landfills. The director has 15 landfills from which she can collect samples.How many different samples are possible?
The data results are based on serum continine levels for each group. The claim is that exposure to tobacco smoke (as second-hand smoke) corresponds to higher levels of cotinine.
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