Question

In: Statistics and Probability

A polling institute routinely conducts surveys to gauge the impact of the Internet and technology on...

A polling institute routinely conducts surveys to gauge the impact of the Internet and technology on daily life. A recent survey asked respondents if they read online journals or? blogs, an Internet activity of potential interest to many businesses. A subset of the data from this survey shows responses to this question. Test whether reading online journals or blogs is independent of generation. Use a significance level of

alpha?equals=0.05.

Read Online Journal or Blog

?Yes, Yesterday

?Yes, But Not Yesterday

No

Total

Generation

?Gen-Y (18-30)

2828

3838

6868

134134

?Gen-X (31-42)

1313

3535

133133

181181

Trailing Boomers?(43-52)

1414

3535

143143

192192

Leading Boomers?(53-61)

55

2424

8686

115115

Matures? (62+)

66

2121

111111

138138

Total

6666

153153

541541

760760

PrintDone

Compute the chi squared ?2 test statistic.

Solutions

Expert Solution

H0: Reading online journals or blogs is independent of generation

H1: Reading online journals or blogs is not independent of generation

Let the los be alpha = 5%

The expected frequencies are

Yes, Yesterday Yes, but not yesterday No Total
Gen Y 6.03 12.718 14.252 33
Gen X 17.907 37.767 42.326 98
Trailing Boomers 7.492 15.8 17.708 41
Leading Boomers 11.146 23.51 26.346 61.002
Maturers 12.425 26.21 29.369 68.004
Total 55 116.005 130.001 301.006

The chisquare contribution values are

Oi Ei (Oi-Ei)^2 /Ei
6 6.03 0.0001
9 17.907 4.4304
10 7.492 0.8396
11 11.146 0.0019
19 12.425 3.4793
21 12.718 5.3933
29 37.767 2.0351
16 15.8 0.0025
20 23.51 0.524
30 26.21 0.548
6 14.252 4.778
60 42.326 7.3801
15 17.708 0.4141
30 26.346 0.5068
19 29.369 3.6609
Total: 33.9941

Degrees of freedom: 8

Test Statistic, X^2: 33.996
Critical X^2: 15.5073
P-Value: 0.0000

Here chisquare value > Chsiquare critical value and P-value < alpha 0.05 so we reject H0

Thus ew conclude that Reading online journals or blogs is not independent of generation

orchestra answered 2 years ago
Next > < Previous

Related Solutions

1.The Insurance Institute for Safety conducts tests with crashes of this year’s Canyonero SUV. The institute...
1.The Insurance Institute for Safety conducts tests with crashes of this year’s Canyonero SUV. The institute is examining low speed impact and is testing how much it costs to make repairs to the car when the car crashes when it is moving at around 20 mph. The car manufacturer claims that the mean repair costs are less than $4, 500.The institute takes a random sample of several Canyoneros and examines the cost to repair the cars when they crash into...
Are technology-based surveys better than handwritten surveys? Why or why not?
Are technology-based surveys better than handwritten surveys? Why or why not?
The polling organization Ipsos conducted telephone surveys in March of 2004, 2005 and 2006. In each...
The polling organization Ipsos conducted telephone surveys in March of 2004, 2005 and 2006. In each year, 1001 people age 18 or older were asked about whether they planned to use a credit card to pay federal income taxes that year. The data are given in the accompanying table. Is there evidence that the proportion falling in the three credit card response categories is not the same for all three years? Test the relevant hypotheses using a .05 significance level....
A polling organization conducted telephone surveys in March of 2004, 2005 and 2006. In each year,...
A polling organization conducted telephone surveys in March of 2004, 2005 and 2006. In each year, 1001 people age 18 or older were asked about whether they planned to use a credit card to pay federal income taxes that year. The data are given in the accompanying table. Is there evidence that the proportion falling in the three credit card response categories is not the same for all three years? Test the relevant hypotheses using a 0.05 significance level. (Round...
The polling organization Ipsos conducted telephone surveys in March of 2004, 2005 and 2006. In each...
The polling organization Ipsos conducted telephone surveys in March of 2004, 2005 and 2006. In each year, 1001 people age 18 or older were asked about whether they planned to use a credit card to pay federal income taxes that year. The data are given in the accompanying table. Is there evidence that the proportion falling in the three credit card response categories is not the same for all three years? Test the relevant hypotheses using a .05 significance level....
The polling organization Ipsos conducted telephone surveys in March of 2004, 2005 and 2006. In each...
The polling organization Ipsos conducted telephone surveys in March of 2004, 2005 and 2006. In each year, 1001 people age 18 or older were asked about whether they planned to use a credit card to pay federal income taxes that year. The data are given in the accompanying table. Is there evidence that the proportion falling in the three credit card response categories is not the same for all three years? Test the relevant hypotheses using a .05 significance level....
Answer the following questions with APA references: 1.    What is the impact of Internet technology on...
Answer the following questions with APA references: 1.    What is the impact of Internet technology on the security of health related information? 2.    What are the implications of the HIPAA as it relates to protection of health information? 3.    What are some issues related to privacy, security and confidentiality that the nurse may be confronted with? What are the implications for patient safety? 4.    How does an information system security affect privacy, confidentiality and security? 5.    What security measures can...
2. A public polling agency conducts a survey to determine the current consumer sentiment concerning the...
2. A public polling agency conducts a survey to determine the current consumer sentiment concerning the state of the economy. Last year's poll shows that 30% of consumers are optimistic about the state of the economy. Suppose the public polling agency randomly samples 485 consumers and finds that only 158 are optimistic about the state of the economy. a) What is the parameter of interest? explain b) Construct a 95% confidence interval for the parameter of interest and interpret the...
The Quinnipiac polling institute claims that 70% of college stu- dents live on campus. A researcher...
The Quinnipiac polling institute claims that 70% of college stu- dents live on campus. A researcher takes a sample of 200 college students to see if the proportion is less. In the researcher’s sample, 132 college students live on campus. (a) Develop the null and alternative hypotheses. (b) At α = 0.02, what is the rejection rule? (c) What is the value of the test statistic z? (d) Should the researcher reject H0? (e) Based on your answer in part...
What impact has modern technology, such as the Internet, media, social networking, advertising, had on eating...
What impact has modern technology, such as the Internet, media, social networking, advertising, had on eating disorders in children and adolescents? How can such be used in a positive way rather than causing harm?
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT