Question

A researcher drew a random sample of 57 college students and asked whether they knew how...

A researcher drew a random sample of 57 college students and asked whether they knew how to properly recycle e-waste. The researcher also asked them their academic major (whether they were a computer science major "yes" or "no"). The researcher obtained the results in the table below. Open the M15 Data File and follow the instructions on how to run a chi-square test in SPSS.

Do you know how to properly recycle e-waste?

Academic Major Yes No
Non-Computer Science 5 19
Computer Science 26 7

Use this information to answer questions #1 - #6.

Question 1

What is the expected frequency for non-computer science majors who do not know how to properly recycle e-waste?

Question 2

What is the expected frequency for non-computer science majors who know how to properly recycle e-waste?

Question 3

What is the expected frequency for computer science majors who know how to properly recycle e-waste?

Question 4

What is the expected frequency for computer science majors who do not know how to properly recycle e-waste?

Question 5

What is the chi-square value?

Question 6

What are the df?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1
Observed Frequencies
Yes No Total
Non-computer 5 19 24
Computer 26 7 33
Total 31 26 57
Expected Frequencies
Yes No Total
Non-computer 31 * 24 / 57 = 13.0526 26 * 24 / 57 = 10.9474 24
Computer 31 * 33 / 57 = 17.9474 26 * 33 / 57 = 15.0526 33
Total 31 26 57
(fo-fe)²/fe
Non-computer (5 - 13.0526)²/13.0526 = 4.968 (19 - 10.9474)²/10.9474 = 5.9233
Computer (26 - 17.9474)²/17.9474 = 3.6131 (7 - 15.0526)²/15.0526 = 4.3079

Test statistic:  

χ² = ∑ ((fo-fe)²/fe) = 18.8122

df = (r-1)(c-1) = 1

p-value = CHISQ.DIST.RT(18.8122, 1) = 0.000

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A researcher drew a random sample of 24 people seeking asylum in the United States and...
A researcher drew a random sample of 24 people seeking asylum in the United States and recorded whether they were granted amnesty ("yes" or "no"). The researcher also grouped them according to their gender ("male" or "female"). The results are below: Granted General Amnesty Gender of Asylum Seeker Yes No Male 5 4 Female 8 7 Enter this information into SPSS. Use this information to answer questions #4 - #7. Question 4 Identify the null hypothesis and research (alternative) hypothesis....
market researcher tests whether watching a particular soap opera depends on the viewer's age. A random...
market researcher tests whether watching a particular soap opera depends on the viewer's age. A random sample of adult viewers of the The Young and the Restless is collected over a 30-day period; data are presented below:                                                Watched? Viewer's age                 Yes             No 18-25 years 33 40 26-40 78 55 41+ years 18 84 Part a: State the null hypothesis for a two-way chi-square test involving watch status (Yes/No) and viewer's age. [3 points] Part b: What is the expected...
A researcher records whether n = 247 children do or do not have asthma at age...
A researcher records whether n = 247 children do or do not have asthma at age 13, and then again records whether these same 247 individuals have asthma 7 years later. Results are shown in the following table: Asthma at age 20? Asthma at age 13? Yes No Yes 55 16 No 12 164 1. What is the expected frequency of "asthma at 13" and "asthma at 20"? [Answer to 2 decimal places.] 2. What is the expected frequency of...
A random sample of 100 traditional aged college students were asked whether they would turn to...
A random sample of 100 traditional aged college students were asked whether they would turn to their father or mother for advise if they had a personal problem. A second sample of 100 different traditional aged college students was asked the same question regarding an academic issue. If 47 of the students in the first sample and 56 of the students in the second sample replied that they turned to their mother rather than their father for help, test the...
A researcher records whether n=280n=280 children do or do not have asthma at age 13, and...
A researcher records whether n=280n=280 children do or do not have asthma at age 13, and then again records whether these same 280280 individuals have asthma 7 years later. Results are shown in the following table: Asthma at age 20? Asthma at age 13? Yes No Yes 85 17 No 5 173 1. What is the expected frequency of "asthma at 13" and "asthma at 20"? [Answer to 2 decimal places.] 2. What is the expected frequency of "asthma at...
Sixty-four students in an introductory college economics class were asked how many credits they had earned...
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. At α = .10, is the degree of certainty independent of credits earned? Credits Earned Very Uncertain Somewhat Certain Very Certain Row Total 0 – 9 12 6 5 23 10 – 59 9 5 7 21 60 or more 4 9 12 25 Col Total 25 20 24 69 (a) At...
A random sample of 200 voters over the age of 60 were asked whether they thought...
A random sample of 200 voters over the age of 60 were asked whether they thought Social Security benefits should be increased for people over the age of 65. A total of 95 of them answered yes. A random sample of 150 voters aged 18-25 were asked the same question and 63 of them answered yes. Can you conclude that the proportion of voters who support an increase in Social Security benefits is greater among older voters? Use the alpha=...
You have asked a sample of men and women in your community whether or not they...
You have asked a sample of men and women in your community whether or not they intend to vote for a gas tax to raise money for public transportation. Of the men, 15 said "yes" and 20 said "no"; of the women, 25 said "yes" and 10 said "no". Assuming that proper experimental procedures have been followed, what can you conclude? (note: if you determine that the df = 1, or an expected frequency is less than 5, then you...
Sixty-four students in an introductory college economics class were asked how many credits they had earned...
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. At α = .01, is the degree of certainty independent of credits earned?   Credits Earned   Very   Uncertain   Somewhat   Certain Very Certain Row Total   0 – 9 11          10           3            24            10 – 59 10          5           9            24            60 or more 2          9          ...
The following two-way table of counts summarizes whether respondents smoked or not and whether they have...
The following two-way table of counts summarizes whether respondents smoked or not and whether they have had ever divorced or not for persons who had ever been married. Ever Divorced? Smoke? Yes No Yes 290 204 No 436 455 Among those who smoked, what percentage has ever been divorced? [Answer to 2 decimal places. Do not type % symbol in the box.]  % Tries 0/5 Among those who has ever been divorced, what percentage smoked? [Answer to 2 decimal places. Do...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT