Question #10: What is the difference between independent samples and dependent samples? Please select the correct t-test for the description below: choose either independent t-test or dependent t-test Two separate scores are obtained for each individual in the sample.                                                  The same subjects are used in all treatment conditions or at all-time points.                                                  The scores in the two samples are not related in any systematic way.                                                  The scores in the two samples are related in any systematic way.

HOW DO I SOLVE THIS PROBLEM

How are related samples different from independent samples?

What is the distinguishing feature of a case-control study such as this? An epidemiologist performed a case-control study examining whether tobacco use was associated with oral cancer. The investigator recruited a random sample of 75 adults with oral cancer and 72 adults without oral cancer. Participants were interviewed and asked about their history of tobacco use. O Exposure status was assessed, and then the participants were followed up over time to see who developed the outcome. O The exposure and outcome were measured at the same time, so temporality cannot be established. O Participants were selected based on disease status, and then exposure status was assessed from the past. O The investigator randomized participants into exposure groups and then followed them to see who developed the outcome.

When should you use a z-test versus a single sample t-test?

Explain the difference between dependent and independent samples

State the number of degrees of freedom available for determining the​ within-samples variation.

An I/O psychologist wants to know if there is a difference in worker evaluations depending if the evaluator is a male or female.  15 men and 15 women managers were asked to rate on a scale of 0-10 the same group of worker files.  The ratings on the worker evaluations were recorded for each manager.  Which statistical test would be best to determine if there is a significant difference between groups?     one-sample t-test     dependent samples t-test     independent samples t-test     ANOVA

A paint company has large outlet stores in two cities. Ten samples of the weekly sales (in tons) for the two cities are as follows. City A: n = 10, X10 = 148.5, S1 = = 4.3. City B: n = 10, Y 10 = 144.2, S2 = 3.8. At a = 0.05 level of significance, test if the weekly sales are different. The following ¨answers" have been proposed. (a) The null hypothesis is that the weekly sales are the same and the alternative is that the they are not the same. By using an F test, we reject the null hypothesis. (b) The null hypothesis is that the weekly sales are the same and the alternative is that the they are not the same. By using an F test, we do not reject the null hypothesis. (c) The null hypothesis is that the weekly sales are the same and the alternative is that the they are not the same. By using a i test, we do not reject the null hypothesis. (d) The null hypothesis is that the weekly sales are the same and the alternative is that the they are not the same. By using a i test, we reject the…

This research was conducted with Korean adolescents in the Los Angeles area. Would you be willing to generalize the results of this study to Korean adolescents who live in other regions of the country? Why or why not.