Question

In: Statistics and Probability

Problem Set 1: Chi Square Goodness of Fit (7 pts) A teacher believes that the percentage...

Problem Set 1: Chi Square Goodness of Fit (7 pts)

A teacher believes that the percentage of students at her high school who go on to college is lower than the rate in the general population of high school students. The rate in the general population is 69.7% (BLS, 2017). In the most recent graduating class at her high school, the teacher found that of 104 who graduated, 61 of those went on to college.

  1. Complete the following chart (round to two decimal places when calculating the expected values). Show all work in the space provided beneath it. (1 pt per row = 2 pts total)

Frequencies

Went to college

Did not go on to college

Observed

(answer)

(answer)

Expected

(answer)

(answer)

WORK:

  1. Create an SPSS data file and run the test in SPSS. Paste appropriate SPSS output. (2 pts)
  1. Write an APA-style Results section based on your analysis. All homework “Results sections” should follow the examples provided in the presentations and textbooks for that particular statistical test. Don’t forget to include a decision about the null hypothesis. (3 pts)

Solutions

Expert Solution

Frequencies Went to college Did not go on to college Total
Observed 61 43 104
Expected 72.49 31.51 104

Work:

Expected frequency(went to college)

Expected frequency(did not go on to college)

The appropriate SPSS output is,

Category

Observed N

Expected N

Residual

Went to college

61

72.5

-11.5

Do not go on to college

43

31.5

11.5

Total

104

Test Statistics

Category

Chi-Square

6.011a

df

1

Asymp. Sig.

.014

a. 0 cells (0.0%) have expected frequencies less than 5. The minimum expected cell frequency is 31.5.

We reject the null hypothesis.

That is, the percentage of students who go on to college is lower than the rate in the general population of high school students.

Please upvote my answer if you find it helpful. Thanking you.


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