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Assume John is conducting a one-way ANOVA with three groups. Naturally he specifies the null hypothesis as Mean1=Mean2=Mean3. After learned about the t-test, he claims that the ANOVA can also be accomplished by three separate t-tests on the three pairs of means. In other words, the null hypotheses in the three t-tests would be: Mean1=Mean2; Mean2=Mean3; Mean1=Mean3. He further argues that the t-tests are preferable since they help to identify which mean(s) is(are) significantly different from other(s) while the one-way ANOVA could not without further tests. Do you agree with John? Why or why not?
131 are enrolled in both economics and mathematics course. Determine the probability that freshman selected at random from group is enrolled in each of the following?
In the biology class the mean score was 79 with standard deviation 5.
Graph the relationship between the two variables and is there sufficient evidence to infer that height and length of index fingers are linearly related?
If the probability of making a two point shot is greater than the probability of making a three point shot, why do coaches allow some players to shoot the three point shot if they have the opportunity? Use expected value to explain your answer.
As sample size increases, the standard error of M _______________ .
If you wanted to determine which of the two learning programs made the bigger difference in the participant's knowledge and skills, what statistical tests would you perform? What assumptions would the test have to meet before you proceed? How would y..
a statistician employed by a consumer testing organization reports that at 95 confidence he has determined that the
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
Understand autocorrelation and multicollinearlity in reference to the following questions. What type of regression is it common in? When is it likely to occur? What is its negative impact? How do we see if it exists? If found, how is it eliminated..
Prepare a 2 slide Microsoft PowerPoint Presentation with speaker notes, how to use a z-test to test the null hypothesis and give an example of z-test to test the null hypothesis
Give an example of two variables that probably have a significant linear correlation coefficient, but one variable does not necessarily cause the other.
What is the formula for converting z-scores to percentiles? I want to build a tool in Excel so i can get percentiles from test scores on normally distributed psychometric tests.
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