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An advertising firm's single best client is a food manufacturer. This food manufacturer wants to fine tuned its brand development efforts; enlisting the help of the advertising firm. Advertising firm's data showed that among 280 middle class families, ave. monthly food expenditures amounted to $15,366 with a standard deviation of $2585. In comparison, similar data involving 420 poor families showed an ave. of $7,640 with a standard deviation of $3,022.
A.) Verify that middle class families allocate a statistically larger average amount on food than poor families using the firm's data. Use a 5% significance level in your verification.
B.) Test that the standard deviation in the food allocation of poor families is at most $4,000. Use a 5% significant level.
You are running a chi-squared test. You have 2 groups with 3 characteristics each, what would your critical value be with an alpha of .025?
Which test should we use to determine whether the difference between Mesa and Tempe is statistically significant? Why? Should it be one or two-tailed?
Basic Statistics problem
Tthe sticks in the shipment fail to meet specifications. What is the probability that no more than 3 will be defective? What is the probably that more than 5 will be defective?
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What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
A pollster calls 500 randomly selected people and all 500 respond to her first question. Because the subjects agreed to respond, is the sample a voluntary response sample?
The response of the GSS question in 2006 about the number of hours daily spent watching TV, the responses by the seven subjects who identified themselves as Hindus were 2,3,2,1,0,1,4,3. find a point estimate of the population mean for Hindus. The ..
With a=.05 and a sample of n=15 in a repeated-measures study comparing two treatments, what are the t statistic boundaries for the two-tailed critical region?
At the Statsville County Fair, the probability of winning a prize in the ring-toss game is 0.1. Show the probability distribution for the number of prizes won in 8 games.
Conduct a hypothesis test for each sample at the 0.01 level of significance and determine what action, if any should be taken.
Suppose that possibility of being seated at two restaurants are independent of each other, determine the probability that. Both restaurants will be able to seat you next Saturday night?
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