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At Beal university, the average gpa (grade point average) of all students is 2.5. The standard deviation of all gpa's is 0.5. Approximate the probability that in a sample of 32 students, the average gpa of the 32 students is between 2.4 and 2.6.
The U.S. Census Bureau (2000 census) reported the following relative frequency distribution for travel time to work for a large sample of adults who did not
If the average daily intake among 25-34-year-old males in the general population is 15 g, then, using a significance level of .05, test the hypothesis that the intake of linoleic acid in this group is lower than that of the general population. Als..
What is the minimum number of gas stations that she should include in her sample if she uses the standard deviation estimate of $0.32, as reported in the popular press?
Suppose that a judge's decisions are upheld by an appeals court 90% of the time. In her next 10 decisions, what is the probability that 8 or more of her decisions are upheld by an appeals court
suppose bolts are being manufactured using a process so that it is known that the length of the bolts follows a normal
(c) Find the standardized test statistic.? (d) Decide whether to reject or fail to reject the null hypothesis.
(1) You should start by running the same test he did in which he came to the decision that he could not conclude a difference. (2) Perform the test as it should have been done and find if you come to a different conclusion. (3) Explain why the result..
1. what percentage of people falls between -2 and 2 standard deviations on iq scores if the general population of iq
What does the slope of the estimated regression line indicate? Develop a scatter diagram of sales versus advertising and explain what it shows regarding the relationship between sales and advertising.
Rental car gasoline prices per gallon were sampled at eight major airports. Date for Hertz and National car rental companies follow (USA today April 4, 2000)
Donations. Organizers of a televised fundraiser know from past experience that most people donate small amounts ($10-$25), some donate larger amounts ($50-$100)
A researcher has studied subjects' ability to learn to translate words into Morse code. He has experimented with two treatment conditions
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