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As reported in the KC Star on July 19, 2013, from a survey commissioned by insurance.com of 500 motorists, 34% of women cited their husbands as being the worst backseat drivers, while 40% of the men said the same thing about their wives. Assuming 250 of each sex, can we conclude that there is a significant difference in the proportions at a 0.05 level of significance?
would this prove that they are exceeding their goal, using α = 0.025?
Produce the scatter plot for sodium and bp. Do you think there are any outliers?
The sales manager had predicted, before the business started, that year 1's sales would be 410 air conditioners. Using exponential smoothing with a weight of alpha = 0.30, develop forecasts for years 2 through 6.
Determine the probability that a randomly selected teacher earns more than $525 per week?
The profit for product 1 is $6 per unit, and the profit for product 2 is $4 per unit. Solve this model by using graphical analysis.
In baseball, a "no-hitter" is a regulation 9-inning game in which the pitcher yields no hits to the opposing batters. Chance (Summer, 1994) reported on a study of no-hitters in Major League Baseball (MLB).
At 0.05 level of significance, is there evidence of significant relationship between age group and where people mainly get their news? If so, describe the relationship.
Does the normal distribution yield a good approximation of the actual results?
A simple random sample of 50 adults is obtained, and each person's red blood cell count (in cells per microliter) is measured. The sample mean is 5.23 and the sample standard deviation is 0.54. Use a 0.01 significance level to test the claim that ..
At 1 excavation site 8641 pot shards have been found that have not presently been cleaned also identified. Define the probability.
The first step in this assignment is to provide SPSS with the Value Labels for the values in LOCALE97.
Find out whether this is enough evidence to accept or reject manager's null hypothesis, using alpha = .01. Is this test left-tailed, right-tailed or two-tailed?
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