A researcher has two samples of participants, and each sample experiences a different level of the...
- A researcher has two samples of participants, and each sample experiences a different level of the independent variable. Sample A has 8 participants and Sample B has 10 participants. The corrected variance for Sample A is 7.71 and the corrected variance for Sample B is 9.34.
- What is the pooled degrees of freedom between the 2 samples? (hint: you shouldn’t use the pooled variance equation).
- Find the pooled variance using the pooled variance equation.
- Convert the pooled variance to variance versions of standard error using the equation s2Mx=s2pooled/Nx for both Sample A and Sample B
- Add the two variance versions of standard errors together and square root the result to find the standard error.
- Using the total degrees of freedom, find the cutoff values for the two-tailed test at an alpha level of 0.05.
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A researcher has two samples of participants, and each sample
experiences a different level of the...
A researcher has two samples of participants, and each sample experiences a different level of the...
A researcher has two samples of participants, and each sample experiences a different level of the independent variable. Sample A has 8 participants and Sample B has 10 participants. The corrected variance for Sample A is 7.71 and the corrected variance for Sample B is 9.34. What is the pooled degrees of freedom between the 2 samples? (hint: you shouldn’t use the pooled variance equation). Find the pooled variance using the pooled variance equation. c . Add the two variance...
3. The t test for two independent samples- Two-tailed example AaAa? Bullying," according to noted expert...
3. The t test for two independent samples- Two-tailed example AaAa? Bullying," according to noted expert Dan Olweus, "poisons the educational environment and affects the leaning of every child." Bullying and victimization are evident as early as preschool, with the problem peaking in middle school. Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure depression in a group...
uunt lailieu or à two-tailed Question 4 (1 point) When variances between two samples are not...
uunt lailieu or à two-tailed Question 4 (1 point) When variances between two samples are not equal in an independent-sample t- test, the pooled variance must be computed and used in place of the estimated standard error. a) True b) False
one sample has ss=36 and a second sample has ss=18 If n=4 for both samples, find...
one sample has ss=36 and a second sample has ss=18 If n=4 for both samples, find each of the sample variances and compute the pooled variance. Because the samples are the same size, you should find that the pooled variance is exactly halfway between the two sample variances. The first sample has ________ (choose one of the following 12.00, 9.00, 6.00, 3.00), and the second has s^2=______((choose one of the folloeing 12.00, 6.00, 3.00, 4.50). The pooled variance is s^2p=________(9.00,...
when variances between two samples are not equal in a paired sample t test, the pooled...
when variances between two samples are not equal in a paired sample t test, the pooled variance must be computed and used 8n place of the estimated standard error. t or f
A researcher conducts an experiment consisting of two groups—Group 1, non-smokers, and Group 2, ex-smokers. Group...
A researcher conducts an experiment consisting of two groups—Group 1, non-smokers, and Group 2, ex-smokers. Group 1 consists of 10 participants, while Group 2 has 12 participants. If the researcher conducts a two-tailed two-independent sample t-test, what will the degrees of freedom and the critical values at a 0.05 level of significance be? (Round your critical values to three decimal places.) degrees of freedom critical value (smaller value) critical value (larger value)
6. The t test for two independent samples - One-tailed example using tables Aa Aa Most...
6. The t test for two independent samples - One-tailed example using tables Aa Aa Most engaged couples expect or at least hope that they will have high levels of marital satisfaction. However, because 54% of first marriages end in divorce, social scientists have begun investigating influences on marital satisfaction. [Data source: This data was obtained from National Center for Health Statistics.] Suppose a counseling psychologist sets out to look at the role of economic hardship in relationship longevity. He...
For the independent-measures t test, which of the following describes the estimated standard error of M1 - M2 (whose sy...
For the independent-measures t test, which of the following describes the estimated standard error of M1 - M2 (whose symbol is )? O The variance across all the data values when both samples are pooled together O A weighted average of the two sample variances (weighted by the sample sizes) O The difference between the standard deviations of the two samples O An estimate of the standard distance between the difference in sample means (M, - M2) and the difference...
Attempts: Average: /10 ttestion Due th a bug in Googe Chrome. this page may not fuactioo...
Attempts: Average: /10 ttestion Due th a bug in Googe Chrome. this page may not fuactioo correety Chcs heme learo 9. The t test for two independent samples - Two-tailed example Aa Aa Bullying," according to noted expert Dan Olweus, "poisons the educational environment and a every child." Bullying and victimization are evident as early as preschool, with the problem peaking Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those...
If you are comparing two samples (each sample has 20 observations), which test will give you...
If you are comparing two samples (each sample has 20 observations), which test will give you the most conservative outcome? A. the t-test with separate variances B. all of the tests should give you the same outcome since the sample does not change C. the Z test D. the pooled variance t-test
3. The t test for two independent samples- Two-tailed example AaAa? Bullying," according to noted expert Dan Olweus, "poisons the educational environment and affects the leaning of every child." Bullying and victimization are evident as early as preschool, with the problem peaking in middle school. Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure depression in a group...
uunt lailieu or à two-tailed Question 4 (1 point) When variances between two samples are not equal in an independent-sample t- test, the pooled variance must be computed and used in place of the estimated standard error. a) True b) False
6. The t test for two independent samples - One-tailed example using tables Aa Aa Most engaged couples expect or at least hope that they will have high levels of marital satisfaction. However, because 54% of first marriages end in divorce, social scientists have begun investigating influences on marital satisfaction. [Data source: This data was obtained from National Center for Health Statistics.] Suppose a counseling psychologist sets out to look at the role of economic hardship in relationship longevity. He...
For the independent-measures t test, which of the following describes the estimated standard error of M1 - M2 (whose symbol is )? O The variance across all the data values when both samples are pooled together O A weighted average of the two sample variances (weighted by the sample sizes) O The difference between the standard deviations of the two samples O An estimate of the standard distance between the difference in sample means (M, - M2) and the difference...
Attempts: Average: /10 ttestion Due th a bug in Googe Chrome. this page may not fuactioo correety Chcs heme learo 9. The t test for two independent samples - Two-tailed example Aa Aa Bullying," according to noted expert Dan Olweus, "poisons the educational environment and a every child." Bullying and victimization are evident as early as preschool, with the problem peaking Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those...
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