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Use a simple regression model to test the null hypothesis against the alternative
Ho: B1 = 0
H1: B1does not = 0
with a type I error or level of significance of = 0.05, given the following regression statistics:
a. The sample size is 35, SST = 100,000, and the correlation between X and Y is 0.46.
b. The sample size is 61, SST = 123,000, and the correlation between X and Y is 0.65.
c. The sample size is 25, SST = 128,000, and the correlation between X and Y is 0.69.
For a sample of 120 students selected at random, what is the mean and variance of the number of students who watch this game?
Which study has the higher probability of a Type II error, the 60-subject study or the 100 -subject study? Which study has higher power?
The following table gives the number of commercial airline accidents and the total number of resulting fatalities in the United States in the years from 1985 to 2006. Represent the number of yearly airline accidents in a frequency table.
consider the game where two dice die a and die b are rolled. we say that die a wins and write a gt b if the outcome of
The company wants to formulate a linear programming model to determine the number of grams of each ingredient that must go into the drug in order to meet the antibiotic requirements at the minimum cost.
The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Explain your rea..
How large a sample should be tested in order to be 99% confident that the true proportion of inedible fish is estimated to within 7%? Use 2.575 as the critical value for a 99% confidence interval.
a company has estimated that a proposed 10000 investment will generate 3250 for each of the next four years. their
Cold this past winter and found out how long their cold symptoms lasted. Assuming that the Central Limit Theorem applies, give the sampling distribution of X for n = 50.
A chocolate bar is considered underweight if it weighs less than 8.0 oz. What proportion of chocolate bars weighs less than 8.0 oz?
explain the distinction between at least 3 out of 5 vs. at most 3 out of 5. identify other terminology or expressions
Treatment conditions and obtains 30 scores in each treatment. If the researcher used a repeated-measures design, then how many individuals participated in the research study?
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