For each scenario below, state the null hypothesis in words, decide whether you would reject the null hypothesis, and decide whether the p value is low or not.

1. The mean score in Condition A was 20 (SD = 3) and the mean score in Condition B was 15 (SD = 3). There were 100 participants in each condition.

What is the null hypothesis?
Should you reject the null hypothesis?	Yes	Maybe	No
Is the p value low or not?	Low	Not Sure	Not Low

1. In a sample of 100 college students, the correlation between stress levels and number of physical symptoms was r = +.15.

What is the null hypothesis?
Should you reject the null hypothesis?	Yes	Maybe	No
Is the p value low or not?	Low	Not Sure	Not Low

1. In one condition of an experiment, participants were put in a happy mood and then filled out a questionnaire about their willingness to help people. In another condition, they were put in a sad mood and then filled out the same The 75 in the happy condition were on average more willing to help than the 70 people in the sad condition; Cohen's d was 0.93.

What is the null hypothesis?
Should you reject the null hypothesis?	Yes	Maybe	No
Is the p value low or not?	Low	Not Sure	Not Low

1. Cohen's d in a study was 0.02. You are not sure how many participants there were.

What is the null hypothesis?
Should you reject the null hypothesis?	Yes	Maybe	No
Is the p value low or not?	Low	Not Sure	Not Low

1. In a class of 20 students, the correlation between a paper-and-pencil measure of their tendency to procrastinate and their final grades was .21.

What is the null hypothesis?
Should you reject the null hypothesis?	Yes	Maybe	No
Is the p value low or not?	Low	Not Sure	Not Low

1. A researcher studied almost 10,000 residents of the Czech Republic and found that the correlation between their beer consumption and their life satisfaction was -.06.

What is the null hypothesis?
Should you reject the null hypothesis?	Yes	Maybe	No
Is the p value low or not?	Low	Not Sure	Not Low