Survey Project Part II Data Collection and Analysis

Survey Project Part II BY: DANYELLE HUGHES, SARA JANE ANDERSON, SOPHIA DEFEO, AND BRIANNA EFAW

Why We Chose Our Question? The question we chose was How important to you is it that presidential candidates release their tax returns? The answer choices given were Not important, Somewhat important, or Very important This question was chosen because of the recent media news covering this issue for weeks, and it seemed as though the releasing the tax return issue didn t sit too well with many of the American people. We decided to see what Longwood University students had to say.

Data Collection Day 1 Monday: Sophia went to the Student Union (STU) from 9:00am-10:50am, and collected 9 surveys. Danyelle went to Wheeler Lawn from 9:50am-10:50am, and collected 12 surveys Sophia went to Dorrill Dining Hall (DHall) from 12:00pm-1:00pm and collected 18 surveys.

Data Collection Day 2 Tuesday: Danyelle went to Ruffner fountain from 7:00am-8:00am, and collected 15 surveys. Sophia returned to STU from 9:00am-10:00am, and collected 9 surveys Brianna went to Brock Commons beside the library from 1:00pm- 3:00pm and collected 8 surveys. Sara Jane and Brianna went to DHall from 5:00pm-7:00pm, and together collected 9 surveys.

Data collection Day 3 and Day 4 Wednesday: Brianna go back to Brock Commons by the Library from 1:00pm- 3:00pm and collected 7 more surveys. Brianna returned to D-Hall from 5:00pm-7:00pm and collected 7 surveys. Thursday: Sara Jane went to Stevens and the walkway in front of Wheeler and Cox from 1:30pm-3:00pm, and collected 12 surveys.

Why those places? Why that time? We chose these places because we knew that these were the places where you see the most amount of students at one time. We made sure that when we went to any building where classes were held that we went at the beginning of the hour and/or a quarter till the next hour to catch as many students as possible.

Demographic Comparison Longwood Demographics Female make up 68% of LU population Survey Demographics 77% of respondents were female students Males make up 32% of LU population 23% of respondents were male students

Demographic Comparison Longwood s Demographics 22.5% of LU population are Freshman Survey Demographics 41% of the106 respondents were Freshman. 26.2% of LU population are Sophomores 30% of the106 respondents were Sophomores. 22.7% of LU population are Juniors 22% of the106 respondents were Juniors. 28.6% of LU population are Seniors 8% of the106 respondents were Seniors.

Bias? Of course theres BIAS!!!! Any data collected is bias, you can t ever have unbiased data. Our first potential bias would be our time slots Our second potential bias was when it came to the entrances Our third potential bias we have is if a person was surveyed twice for the same question

Question 1 In August 31% of voters reported that it was very important to them that the presidential candidates release their tax returns. Sociologists believe that tax returns are less important to college students. Does this sample support the claim?

Hypothesis Test Steps Population: All college students Parameter: Proportion of college students who believe it is very important that presidential candidates release their tax returns. P<.31 Ha (Claim) P .31 Ho Test: NP- 106(.31)= 32.86 = 33 people N(1-P)= 106(1-.31) = 73.14= 73 people 1PropZTest is what we will use!

Hypothesis Statistic and Results When we drew our graph our Ha was on the left and the Ho was the area to the right. Statistic: Z score: .02490 P-value: .5117 Based on our Z score the answer is less than 1 standard deviation away so we are still in our Ho area. Significance Level: .01 We weren t given a significance level so we picked .01.

Hypothesis Interpretation There is not significant evidence to support the claim that college students believe that it is less important that Presidential candidates should release their tax returns.

Question 2 In this election, editorials have claimed that the release of tax returns was more important to women than to men. What is the 95% confidence interval for the difference between the proportion of male students and female students who say that the release of the presidential tax returns is very important to them?

Confidence Interval Population 1: All female students Test: (P1) Population 2: All male students SRS(maybe potential bias) Successes 31 Parameter 1: Proportion of female students who believe it s very important that Presidential candidates release their tax returns. Failures 75 Test: (P2) SRS(maybe potential bias) Parameter 2: Proportion of male students who believe it s very important that Presidential candidates release their tax returns Successes 7 Failures 99 Use 2PropZInt is the test we will use.

Statistic (P1 and P2) and results Confidence Level of 95% (P1) Statistic: N= 106 X= 31 Results: P(hat)= 31/106 = .2925 (.1278 < P1-P2 < .3251) (P2) Statistic N= 106 X= 7 P(hat)= 7/106 = .06638

Confidence Interval Interpretation We are 95% confident that the difference in the proportion of women and men who believe it is important for presidential candidates to release their tax returns is between .1278 and .3251.

Conclusion Surveyed 106 students over the course of 4 days. Interpreted the data Made assumptions based on the data We learned that you cant have completely unbiased data