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A doctor is interested in determining whether a film about exercise makes a significant difference in 10 persons' attitudes about exercise. The results of his questionnaire are shown. A higher numerical value shows a more favorable attitude toward exercise. Is there enough evidence to support the claim at level of significance 0.05, that there was a significant difference in change of attitude? Also find the 95% confidence for the mean difference.
Before 12 11 14 9 8 6 8 5 4 7
After 13 12 10 9 8 8 7 6 5 5
Several Independent Populations, Homogeneity of Proportions (chi-square distribution)
What is the probability that the amount of sodium is more than 1500 mg - What is the probability that the amount of sodium is between 1700 and 2000 mg
Retained earnings versus new common stock Using the data for a firm shown in the following? table, calculate the cost of retained earnings
Assume that the number of customers who arrive at a water ice stand follows the Poisson distribution with an average rate of 6.4 per 30 minutes. What is the probability that three or four customers will arrive during the next 30 minutes?
Are the advertising dollars spent by a company related to total sales revenue? The following data represent the advertising dollars and the sales revenues for various companies in a given industry during a recent year. Construct a scatter plot of ..
Using the rectangle sheet from the earlier "Random Rectangles" activity and a random number table, draw as many samples of size 5 as required in order.
What is the probability that at least 40 of the firefighters will be volunteers in both groups
A school has 200 seniors of whom 140 will be going to college next year. Forty will be going directly to work. The remainder are taking a gap year.
My correlation of -077.2 shows that there is almost no association between GDP and Infant Mortality Rate.
The following set of data: 25, 18, 23, 16, 16, 14, 22, 17, 9, 32, 22, 12, 18, 9, 28, 14, 22, 18, 16, 12, 31, 17, 12, 14, 16, 30, 12, 12, 10, 24, 12, 11
Translate the following arguments into symbolic notation.- Either the dinosaurs were not cold blooded or they were not the ancestors of modern birds.
What volume of O2 at STP is required to oxidize 8.0 L of NO at STP to NO2? What volume of NO2 is produced at STP?
la magnet schools will accept students whose iq scores are in the 99th percentile only. if iq scores have a normal
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