Abner conducted a study to determine if people prefer his long or short hair. He surveyed friends and family and found that significantly more people preferred his old long hair over his new short hair. The results of a one-proportion z-test showed a z-score of 7.222 and p-value of virtually 0, allowing the researchers to reject the null hypothesis that there is no preference and conclude that people do prefer Abner's long hair.

1. Abner-Hair=? Sean Tran Nick Flores Eric Chan

2. The Test Whether Abner looks better with long hair or short Ho=The proportion of people who liked Abner’s long hair and short hair are equal; p=.5 Ha=People prefer abner’s old hair over the new hair; p<.5

3. The Sample One big mexican family A big asian family A smaller asian family Mr. Harts class

4. Conditions Independence Normal Random

5. The Results

6. Better than a pie chart

7. The Test We ran a one proportion z test We ran a one tailed test in order to prove that his old hair was preferred

8. The Test Our z=7.222 Our p=2.575E-13=0.00 Therefore, at the α=.01, level we have sufficient evidence to reject the null hypothesis. We can conclude Ha, that Abner’s old hair makes him sexier

9. Possible Errors People lied

10. Recommendations? Make sure both photos are of the same quality Use a survey