When conducting a two sample t-test using R, which of the following is not a possible...

When conducting a two sample t-test using R, which of the following is not a possible alternative hypothesis?

A. true difference in means is not equal to zero

B. true difference in means is greater than zero

C. true difference in means is less than zero

D. true difference in means is equal to zero

Expert Solution

Solution :

When conducting a two sample t-test using R, which of the following is not a possible

alternative hypothesis is ,

D. true difference in means is equal to zero

orchestra answered 2 years ago

In which of the following scenarios will conducting a two-sample t t -test for means be...

In which of the following scenarios will conducting a two-sample t t -test for means be appropriate? CHECK ALL THAT APPLY. A. To test if there is a difference between the mean annual income of husbands and that of wives in Canada. B. To test if the mean annual income of Ontarians is higher than that of British Columbians. C. To test if there is a difference between the mean annual income of male British Columbians and that of female...

Find the difference between the two groups when using a dependent t-test then find the independent two-sample t-test

data = X1= 14, 8, 6, 14, 20, 13, 9, 12 x2= 13, 4, 1, 8, 10, 12, 8, 6 1. Find the difference between the two groups when using a dependent t-test then find the independent two-sample t-test, and compare the results with those from the dependent t-test

Explain the assumptions for using a two-independent sample t test. Provide an example for when you...

Explain the assumptions for using a two-independent sample t test. Provide an example for when you could use a a One-Sample t test. Provide an example for when a Two-Sample t Test.

Write a simulation in R that shows the distribution of the t-‐test statistic for a two-‐sample...

Write a simulation in R that shows the distribution of the t-‐test statistic for a two-‐sample t test when the null hypothesis is true (i.e. when H0: µ1 -‐ µ2 = 0 is true). To do this, you should use a for loop that repeatedly performs t-‐tests comparing sample means of data that come from distributions with the same population mean and standard deviation. Use rnorm() to take samples, t.test() to perform the t-‐ tests, and use “$statistic” to extract...

Generally, we compare two independent sample means via independent two-sample t test. Is it possible to...

Generally, we compare two independent sample means via independent two-sample t test. Is it possible to compare two independent sample means using ANOVA? please give me a different answer/ explanation. I know someone already asked about this question here, please don't copy it and give me the same answer. THANKS.

What are some possible reasons for two-sample t-test to have no statistical difference between the two...

What are some possible reasons for two-sample t-test to have no statistical difference between the two groups. The hypothesis of the test is determine to find if the two-sample test is larger than a certain amount. Please provide some reasons.

2.2. Indicate which test (paired samples (ie dependent) t-test, independent two samples t-test, one-sample t-test, independent...

2.2. Indicate which test (paired samples (ie dependent) t-test, independent two samples t-test, one-sample t-test, independent samples z-test) is most appropriate for the following situations : A. Comparison of weight gain of two groups of 18 cows where one group was raised following standard practices and the other group was raised following “organic” standards. B. Comparison of scores on a fitness test of Olympic-class distance runners (n=20) with the national average score of people of a similar age range (22-31...

For the following, indicate whether you should use a one sample t-test, paired t-test, or two...

For the following, indicate whether you should use a one sample t-test, paired t-test, or two sample t-test and whether you have chosen a one-sided or two-sided alternate hypothesis: A) Do macroeconomics students at Vanderbilt score significantly higher on the Math SAT than the national average? My Answer: One sample t-test, one tailed B) Do macroeconomics students at Vanderbilt score significantly higher on the Verbal SAT than the national average? My answer: One sample t-test, one tailed C) Report a...

Imagine that a researcher is conducting a paired-samples t test. She finds that the sample mean...

Imagine that a researcher is conducting a paired-samples t test. She finds that the sample mean difference is 3.665, the standard deviation of the difference scores is 9.334, and the sample size is 75. The researcher is also using a typical null hypothesis that proposes no differences between the relevant population means. Under these circumstances, what is the value of Cohen's d? Please retain a minimum of three decimal places for all steps (if relevant) and provide a minimum of...

When Comparing means using the 2 Sample t Test: (A) How many tails are appropriate for...

When Comparing means using the 2 Sample t Test: (A) How many tails are appropriate for this test and why? (B) What assumptions are made by your test? (C) In general, what form of data model is this analysis most appropriate for? (How many IVs and DVs?)

Question