This week we are focusing on Hypothesis Testing

The content will be Chapter 9.

Major objectives:

What is NHST?
What are the steps to Hypothesis Testing?
Writing narrative and statistical hypotheses.
Calculating t
Rejecting or Failing to Reject the null hypothesis
Calculating effect size
Making appropriate conclusions
Type I and Type II errors.

This week's lab:

Objectives:

Obtain a one-sample t-test using JASP.
Obtain Cohen's d

Data: data f17.jasp

Key to Variables

In lab today, you will work in pairs or threes to answer the following research questions. Be sure to write down everything you do in your lab notebook. Use the following steps of hypothesis testing as you answer the question:

Step 1: Write out your narrative hypothesis.

Step 2: Based on your narrative hypothesis, write your statistical hypotheses.

Step 3: Decide on an alpha level. Sketch the distribution and label the relevant points as you find them.

Step 4: Calculate your test statistic value.

Step 5: Look up the critical value in the back of the book. Compare the two values.

Step 6: Reject or retain the null hypothesis. Indicate the value of p.

Step 7: Calculate effect size

Step 8: Write a complete conclusion (statistical significance, direction, and effect size. Put it in terms of the variables).

Lab Question: Are the statistics students at Centenary different from the general college population in terms of self esteem?

The college population has a mean self-esteem of 32.

When you have completed the question, have your lab notebooks checked.

Assignment: Week 6 Lab Report: One-Sample t-test