![Cont… The X² Test3. We’ll be using the x² test.4. d.f.= 3 ; a= 0.05 X² = [(9 – 14.94) ²/ 14.94] + [(5 – 4.48) ²/ 4.48] + [(8 – 7.47) ²/ 7.47] + [(37 – 32.11) ² /32.11] + [(11 - 8.16) ²/8.16] + [(1 – 1.52) ²/1.52] + [(2 – 2.53) ² / 2.53] + [(6 – 10.89) ² / 10.89]= 6.7826.782 < 7.81](https://image.slidesharecdn.com/apstatssurveyprojectdoit-110604200649-phpapp02/85/Ap-stats-survey-project-do-it-12-320.jpg)
Ap stats survey project do it
- 1. AP Stats Survey ProjectMaria Rodriguez Janelle Jones Period 4
- 2. Confidence IntervalsQ1: Are you a male or female?(.00439,.3015)Q2: What grade are you in?(10.789,11.497)Q3: How many comedy shows did you watch last week?- (1.0072,2.2989)
- 3. Confidence Intervals Cont.Q4: Do you like or dislike romantic films?(.32779,.59904)Q5: How many movies did you watch yesterday?(.37307,.93306)Q6: Yes or No. Did you happen to watch the Grammys 2011? - (.22474,.50467)
- 4. Confidence Intervals Cont. Q7: Do you watch shows on the Discovery Channel?- (-.4602,-.1751)Q8: Do you think Johnny Depp is a good actor?(-.5596,-.2838)Q9: Do you like to watch Jeopardy?- (.58591,.80233)
- 5. Confidence Intervals Cont.Q10: Do you like to listen to music?- (-1.009,-.9441)
- 6. Finding a similar studyConducting a hypothesis test Stating the hypothesis :Ho : Our results about the average amount of individuals whom watch TV shows in our survey agree with the larger study we found.Ha : Our results don’t agree with the larger study we found.
- 7. Cont… Similar study2. Assumptions and Conditions Randomness : Questionnaires were sent to about 5000 people who were registered in the category of Japan of pen pal service, and who indicated that they are willing to participate in surveys. 10 % Condition : 805 valid responses from Japanese people who live in Japan were considered in this larger study. Less than 10% of total Japanese population.
- 8. Cont … Similar study3. We’ll be using the 2- Sample T test .4. Do the math :Mean our study: 18.12SD: 13.0n: 25Mean of the larger study: 250.3SD: 22.9N: 2003
- 9. Cont…Similar study5 . In conclusion with such a low p-value of 1.47 X 10 ^ -33 , we must reject the null hypothesis. There is strong evidence that suggests that the mean amount of individuals whom watched TV shows in our survey disagree with the mean results of the larger study. (http://www.japan-guide.com/topic/0107.html)
- 10. The X² Test1. State the hypothesis:Ho: Students in different grade levels show no difference in opinions towards romantic films.Ha: Students in different grade levels show a difference in opinion towards romantic films.
- 11. Cont … The X² TestAssumptions and ConditionsRandomness: We sampled randomly selected classrooms for our survey.10% Condition: The three classrooms involved in our survey made up less than 10 % of all classrooms.
- 12. Cont… The X² Test3. We’ll be using the x² test.4. d.f.= 3 ; a= 0.05 X² = [(9 – 14.94) ²/ 14.94] + [(5 – 4.48) ²/ 4.48] + [(8 – 7.47) ²/ 7.47] + [(37 – 32.11) ² /32.11] + [(11 - 8.16) ²/8.16] + [(1 – 1.52) ²/1.52] + [(2 – 2.53) ² / 2.53] + [(6 – 10.89) ² / 10.89]= 6.7826.782 < 7.81
- 13. Cont… The X² Test 5. Conclusion:Since, 6.782 > 7.81, we can not reject the null hypothesis. Therefore, there isn’t sufficient evidence that suggest there is a difference between opinions among the distinct grade levels.
- 14. Q3 Hypothesis TestConduct hypothesis tests comparing the means of affirmative responses for males vs. females at a = 0.05. Comparing means of affirmative responses for males vs. females: 1. State the hypothesis Ho: M f = M mM f: mean number of comedy shows watched by females, M m: mean number of comedy shows watched by males Ha: M f ≠ M mM f- M m = 0M f- M m≠ 0
- 15. Q3 Hypothesis Test2. Assumptions and ConditionsRandomness: Our sample of female and male students was randomly selected for this survey. Independent: Each individual response of the students no matter if they are female or male was independent of each others responses. 10 % Condition: The three classrooms selected to be in this survey make up less than 10 % of the total classrooms.
- 16. Q3 Hypothesis Test3. We’ll conduct a 2– sample t test. 4. M f : 1.632n: 49 Std: 2.31 M m: 2.06 n : 36Std : 2.67
- 17. Q3 Hypothesis TestIn conclusion, at a = 0.05 , with such a significant p value as 0.442, we can not reject our null hypothesis. There isn’t sufficient evidence that suggest that the mean number of comedy shows watched between female and male students is not the same.