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1. The correlation between two variables is +0.8 for a sample of 10 observations. We wish to show there is a positive relationship between the two variables. Which of the following is a correct statement of the null hypothesis and the alternate hypothesis (H0 = null hypothesis and Ha = alternative hypothesis)?
A.H0: p = 0, HA: p > 0
B.H0: p = 0, HA: p is not equal to 0
C.H0: p = 0, HA: p < 0
D.Depends on the level of significance
2. Suppose 1,000 of the 2,000 UCLA university professors oppose the US policies in Middle East. Using the 0.95 degree of confidence, the interval estimates for the population proportion is
A.about 0.5 to 0.8.
B.between -1 and +1.
C.between 0 and 1.
D.none of the above.
at a certain university 25 of students support the green party. suppose we take samples of size 100 students and are
In the FBI promotion system, last year's decoration points had a standard deviation equivalent to 7.1. This year 27 of the tested individuals had scores with a standard deviation of 4.2.
Uuse a level of significance of a =0.01 to test to see if you have sufficient evidence to support the claim that the defective rate exceeds 3%.
Develop a multiple linear regression equation that describes the relationship between tenure and the other variables in the chart above. Use the Analysis Toolpak located in Excel to perform this multiple regression.
Drugstore was the first e-commerce company to offer Internet drugstore retailing. Drugstore.com customers were provided the opportunity to buy health, beauty, personal care, wellness, and pharmaceutical replenishment products over the Internet.
In a few sentences, describe two designs that can address your research question. The designs must involve two different statistical analyses.
a computer can be classified as either cutting-edge or ancient. 93 of computers are classified as ancient. a what is
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The mean of a normal distribution is 400 pounds. The standard deviation is 10 pounds. a) what is the area between 415 pounds and the mean of 400 pounds?
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
We are interested in testing to find out whether the variance of the population is vitally more than 0.003
Describe the sampling distribution of the sample mean.
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