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Suppose that the highway gas mileage rates for both of these cars are uniformly distributed over a range from 20 to 30 mpg. What proportion of these cars would fall into the 22 to 27 mpg range? Compute the proportion of cars that get more than 28 mpg. What proportion of cars would get less than 23 mpg?
An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools.
Four students each received a raw score of 22 on a different test. Compute the z-score for the raw score value of 22 for each student, given information about the distributions of X values for each test.
The best measure of central tendency for this scenario would be to use median as it is not affected by extremely large values.
use the normal approximation to the binomial to determine what is the probability that: 100 or more murder are committed with a firearm? a. 0.452 b. 0.548 c. 0.367 d. 0.164.
The owner of a restaurant serving Continental-style entrees has the business objective of learning more about patterns of patron demand for the Friday to Sunday weekend time period.
The average number of calories in a small chocolate bar is 225. Suppose that the distribution of calories is approximately normal with 10. Find the probability that a randomly selected chocolate bar will less than 200 calories.
A clinical trial was conducted comparing a new compound designed to improve wound healing in trauma patients to a placebo. After treatment for 5 days, 58% of the patients taking the new compound had a substantial reduction in the size of their wou..
State the decision rule using the .01 significance level. Compute the value of chi-square. What is your decision regarding Ho?
What is the relationship between the sign of the correlation coefficient and the sign of the slope of the regression line?
At the .01 level of significance, is the mean grade of the female students higher than that of the males?
The Ohio Department of Highways is in the process of selecting a new paint for highway use. Four different paint companies have been contact regarding this need and each of the companies has supplied paint for testing.
If writing scores for population have standard deviation of s = 20, does sample give sufficient evidence to conclude that new composition course has significant effect? Suppose a two tailed test with a = 0.05.
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