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The employees of a company were surveyed on questions regarding their educational background and marital status. Of the 600 employees, 400 had college degrees, 100 were single, and 60 were single college graduates. The probability that an employee of the company is married and has a college degree is:
40/600340/600400/600500/600
What would be the correct null and alternative hypothesis for the following situation: The sample has a mean of 72.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the mean speed of all cars is greate..
Ssample by constructing a histogram and finding the sample mean and standard deviation, are we investigating the sampling distribution of the mean? why or why not?
Using convolution, determine the pdf of a continuous random variable Z where Z = X + Y. Here, X has a uniform distribution on [0, 3] and Y is a constant of value 2. Assume that X and Y are independent.
Below, explicitly state slope of your trend line and describe what value of slope signifies in terms of this context.
Find the probability that the age of a randomly selected CEO will be between 56-57 y/o. (round to 4th decimal) The probability a randomly selected CEO will be between 56-57 y/o is?
Two variables in her spreadsheet, and finds r = 0.06. She decides to conclude there is no relationship between the variables. Was she correct?
What is your conclusion regarding null hypothesis?
The proportion who died from coronary heart disease was .00669 for smokers and .00413 for nonsmokers. Describe the association of smoking each alung cancer.
The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (d) Neither will fail? (c) One or the other will fail? Show all steps carefully.
Below are two data sets. Using descriptive statistics, discuss the two data sets in relation to each other. Both data sets come from an operation where potato chips are being placed in small connivance store bags that are to hold 6.0 oz.
Mean income of $30,000and a standard deviation of $3,000. What is the income that separates the top 25% from the lower 75% of the incomes?
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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