Question

1) The standard t test for independent means should NOT be used if the populations are...

1) The standard t test for independent means should NOT be used if the populations are highly __________ in opposite directions.

2) For a study using a t test for independent means, with any given total number of participants, power is greatest when the participants are divided into __________ groups.

3)

In the formula “= S2M1 + S2M2,” “S2M1” represents

Group of answer choices

the variance of the difference scores for Population 1.

the estimated standard deviation of Population 1.

the estimated mean of the distribution of variances of Population 1.

the variance of the distribution of means for Population 1, based on an estimate of the population variance.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #2

It is not feasible to apply t test if data are skewed

1) The standard t test for independent means should NOT be used if the populations are highly skewed in opposite directions.

Power is maximum when the groups are equal size

2) For a study using a t test for independent means, with any given total number of participants, power is greatest when the participants are divided into two equal groups.

S2M1 is The sum of mean square of estimate

In the formula “= S2M1+ S2M2,” “S2M1” represents

the variance of the distribution of means for Population 1, based on an estimate of the population variance.

answered by: anonymous
0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The estimated effect size for a study using a t test for dependent means is the...
The estimated effect size for a study using a t test for dependent means is the mean of the difference scores divided by the: Select one: a. estimated standard deviation of the population of difference scores b. estimated variance of the sample of difference scores c. difference scores d. estimated mean of the population of difference scores
An independent t-test is used to test for: Differences between means of groups containing different entities...
An independent t-test is used to test for: Differences between means of groups containing different entities when the sampling distribution is normal, the groups have equal variances and data are at least interval. Differences between means of groups containing different entities when the data are not normally distributed or have unequal variances. Differences between means of groups containing the same entities when the data are normally distributed, have equal variances and data are at least interval. Differences between means of...
For an independent means t test, we calculate pooled variance for the distribution of scores from...
For an independent means t test, we calculate pooled variance for the distribution of scores from each population. Why do we do this?
Independent random samples were selected from populations 1 and 2. The sample sizes, means, and variances...
Independent random samples were selected from populations 1 and 2. The sample sizes, means, and variances are as follows.               Population               1 2 Sample Size      30 64 Sample Mean      11.4   6.9 Sample Variance        1.37   4.15 (a) Find a 95% confidence interval for estimating the difference in the population means (μ1 − μ2). (Round your answers to two decimal places.) to  
1) A researcher is running an experiment on the effectiveness of three different energy drinks. She...
1) A researcher is running an experiment on the effectiveness of three different energy drinks. She randomly selects 60 individuals from the population and evenly splits them into three groups, each of which consumes a different energy drink. a. The null hypothesis for this test is that at least one of the three groups will be different. True or False? The statistical results of the test are as follows: F(2, 47) = 6.24, p < .05. b. In the above...
Select the statement that is true. The independent variable is only used in the independent t-test...
Select the statement that is true. The independent variable is only used in the independent t-test and the dependent variable is only used in the dependent t-test. The independent t-test is never used in a calculation with more than two groups or sets of data. Independent means that the independent t-test is not related to any other type of t-test. The matched pairs t-test will usually have greater variance than the independent t-test when using the same variables.
1. Provide an example of a study that would utilize a t test for independent means....
1. Provide an example of a study that would utilize a t test for independent means. 2. How is this different from a situation in which you would carry out a t test for dependent means?     
1. A researcher is comparing scores from two treatment groups using independent samples t test. Use...
1. A researcher is comparing scores from two treatment groups using independent samples t test. Use a Hartley’s F-max test to examine this assumption (each group has 6 participants, s2 in group 1 is 20, and s2 in group 2 is 15, set alpha level at .05). Also, how should this researcher estimate the standard error in the independent samples t test?
Independent-Samples t-Test In a research project, researchers track the health and cognitive functions of the elderly...
Independent-Samples t-Test In a research project, researchers track the health and cognitive functions of the elderly in the community. To examine any possible gender differences in their sample, they want to see if the females and the males differ significantly on the education level (number of years of formal schooling). The researchers are not predicting any direction in the possible gender differences so the hypotheses should be non-directional. They would like to run a two-tailed test with α = .10....
Hypothesis Test for Two Populations including t-Test for μ1-μ1 t-Test for μd F-Test for A real...
Hypothesis Test for Two Populations including t-Test for μ1-μ1 t-Test for μd F-Test for A real estate company is interested in testing whether, on average, families in Gotham have been living in their homes different amounts of time than families in Metropolis have. Random samples yield the following results. Assuming equal variances and normal distributions. What is the value of the pooled variance estimate? Gotham Metropolis number sampled: 100 150 Average: 35 months 45 months Standard deviation: 20 months 25...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT