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A real estate agent in the coastal area of Georgia wants to compare the variation in the selling price of homes on the oceanfront with those one to three blocks from the ocean. A sample of 21 oceanfront homes sold within the last year revealed the standard deviation of the selling prices was $45,600. A sample of 18 homes, also sold within the last year, that were one to three blocks from the ocean revealed that the standard deviation was $21,330. At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
Can we conclude that the mean time for a game is less than 3.50 hours? Use the .05 significance level.
If they must form an ethics subcommittee of 4 members, how many different subcommittees are possible?
Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
Based on the result, does there to be an overall perception of 1 minute that is reasonably accurate?
Using the following data on 15 workers, construct an exact 95% confidence interval for µ.
We are establishing a quality control program for a process and need to establish the mean and standard deviation for the process. The first 10 batches had samples of size 5 taken.
Is there evidence of violations of the usual ANOVA assumptions of equal variances and normal populations? Set up and perform appropriate TESTS at the α = 0.05 level of significance.
Calculate the probability that the median of the sample or average medians is:
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
Do students tend to improve their SAT Mathematics (SAT-M) score the second time they take the test? A random sample of four students who took the test twice received the following scores
Make up a scatter diagram with 10 dots for each of the following situations:
A human factors psychologist studied three computer keyboard designs.
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