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The null hypothesis of an F-test comparing three group means is that all three group means are equal. What is the alternative hypothesis?
a. None of the group means are equal.
b. At least two of the group means are not equal.
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
A random sample of 20 students obtained a mean of x = 72 and a variance of s2 = 16 on a college placement test in mathematics. Assuming the scores to be normally distributed, construct a 98% confidence interval for sigma^2.
A uniform probability distribution is a continuous probability distribution where the probability that the random variable assumes a value in any interval of equal length is.
in order to accumulate enough money for a down payment on a house a couple deposits 415 per month into an account
Find the z-score for each student and indicate which one has a better relative position. An Art Major earned a grade of 46 on an exam with = 50 and s = 5.
The national sporting goods association conducted a survey of persons 7 years of age or older about participation in sports activities the total population in this age group was reported at 248.5 million with 120.9 million male and 127.6 million f..
Below are revenue and profit (both in $ billions) for nine large entertainment companies.
SAT verbal scores are normally distributed with a mean of 494 and a standard deviation of 97. Use the Empirical Rule to determine what percent of the scores lie between 300 and 591.
Determine what analysis would you do on each problem (ie, one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
jean researcher is studying the percentage of ethanol in dwi arresteess blood. she tests 16 subjects and finds a mean
the following regression equation y-bar 53.9 8.4x relates x the number of hours a student studies for a test and y
The password of 52 digit sequence is made. It consists of 0 and 1. How various different possibilities exist for networks password.
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