Question

Would I use paired t test or independent t test for the questions below?

Project Background

Procedures Participants are randomly assigned to one of three levels of stress: high stress, where they are writing a final exam immediately following their participation in the experiment; medium stress, where they are writing a final exam the day following their participation; and low stress, where their participation comes two weeks prior to their final exam. They are shown one of two different versions of a video of a bank robbery and instructed to pay close attention to detail. All versions share the same beginning scenario, with two individuals entering a bank to rob it. The first individual (individual #1) is 5'10" tall and of medium build, wearing blue jeans, a black leather jacket, and black tennis shoes. This individual is wearing a ski mask with the holes around the eyes large enough for the color of the skin, which is white or light colored, to be visible. The second individual (individual #2) is 6'2" and heavyset, wearing black sweat pants, a red jacket, and dark work boots. This individual is wearing a ski mask identical to that of individual #1. The skin around the eyes is dark. No other skin is visible on either individual. Individual #1 walks to the window and hands the teller a note, bringing up the right hand, which is in the pocket, to simulate a gun. It is unknown whether an actual gun was used. Individual #2 stays back a step as if keeping watch. After the teller gives money to the robber, the two

Question

This week, you will first look to see whether the type of information participants were given, whether consistent or inconsistent with what they viewed in the video, has a bearing on confidence. You will next explore the hypothesis that memory may decay over time. Choose and calculate the appropriate analysis to compare the confidence levels of participants given consistent feedback on car color and those given inconsistent feedback on car color (the variable name is type of information). Choose and calculate the appropriate analysis to compare Recall 1 with Recall 3. Please fill the blanks

Confidence and Feedback

A XXX t-test was run to determine whether there were differences in confidence levels between participants who were given consistent feedback and participants who were given inconsistent feedback.

Recall Scores A XXX t-test was run to determine whether there were differences in recall scores of participants measured at Time 1 and the recall of participants measured at Time 3.

Answer 1

Confidence and Feedback

An independent t-test was run to determine whether there were differences in confidence levels between participants who were given consistent feedback and participants who were given inconsistent feedback.

The Independent Samples t test compares the means of two independent groups in order to determine whether there is statistical evidence that the associated population means are significantly different. The Independent Samples t test is a parametric test.

Recall Scores

A paired t-test was run to determine whether there were differences in recall scores of participants measured at Time 1 and the recall of participants measured at Time 3.

The paired sample t-test, sometimes called the dependent sample t-test, is a statistical procedure used to determine whether the mean difference between two sets of observations is zero. It is also a parametric test.