EBK ESSENTIAL STATISTICS FOR THE BEHAVI
2nd Edition
ISBN: 9781506386287
Author: PRIVITERA
Publisher: VST
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Chapter 7, Problem 34PR
To determine
To state: The decision made by the researcher.
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Determine whether the study is an experiment or an observational study, and then identify a major problem with
the study.
In a survey, 1465 Internet users chose to respond to this question posted on a newspaper's electronic edition: "Is
news online as satisfying as print and TV news?" 52% of the respondents said "yes."
This is an
because the researchers
the individuals.
What is a major problem with the study?
A. There is no blinding or replication, which has a high chance of leading to bias.
B. The results apply only to Internet users.
C. This is a convenience sample with voluntary response, which has a high chance of leading to bias.
D. The sample is not very large.
A researcher wants to determine if there is an association between gender and political party association. She interviewed 1000 random individuals and recorded their gender and their political party. The results are shown in the table below. Conduct the appropriate hypothesis test using a 0.05 significance level.
What are the hypotheses?
a.
H0: p1 = p2
HA: p1 > p2
b.
H0: p1 = p2
HA: p1 < p2
c.
H0: Gender and Political Party association are related.
HA: Gender and Political Party association are associated.
d.
H0: Gender and Political Party association are independent.
HA: Gender and Political Party association are associated.
e.
H0: Gender and Political Party association are associated.
HA: Gender and Political Party association are independent.
a.
133.33
b.
2.5
c.
10
d.
50
e.
40
f.
133
What is the chi-square contribution for male independents?
a.
10
b.…
What hypothesis and null hypothesis can be determined?
Chapter 7 Solutions
EBK ESSENTIAL STATISTICS FOR THE BEHAVI
Ch. 7 - Prob. 1FPCh. 7 - Prob. 2FPCh. 7 - Prob. 3FPCh. 7 - Prob. 4FPCh. 7 - Prob. 5FPCh. 7 - Prob. 6FPCh. 7 - Prob. 7FPCh. 7 - Prob. 8FPCh. 7 - Prob. 9FPCh. 7 - Prob. 10FP
Ch. 7 - Prob. 11FPCh. 7 - Prob. 12FPCh. 7 - Prob. 13CAPCh. 7 - Prob. 14CAPCh. 7 - Prob. 15CAPCh. 7 - Prob. 16CAPCh. 7 - Prob. 17CAPCh. 7 - Prob. 18CAPCh. 7 - Prob. 19CAPCh. 7 - Prob. 20CAPCh. 7 - Prob. 21CAPCh. 7 - Prob. 22CAPCh. 7 - Prob. 23CAPCh. 7 - Prob. 24CAPCh. 7 - Prob. 25CAPCh. 7 - Prob. 26CAPCh. 7 - Prob. 27CAPCh. 7 - Prob. 28CAPCh. 7 - Prob. 29PRCh. 7 - Prob. 30PRCh. 7 - Prob. 31PRCh. 7 - Prob. 32PRCh. 7 - Prob. 33PRCh. 7 - Prob. 34PR
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- Best on-time airlines: Hawaiian Airlines topped the list of the most punctual U.S. airlines for full-year 2014, according to data released by the Bureau of Transportation Statistics. The on-time arrival performance was 91.9% Another aviation data service believes that this percentage now is even higher. The team of researchers chose 130 randomly selected flights and find that 120 of the flights arrived on time. Can a hypothesis test be used to determine whether the proportion of Hawaiian Airlines flights that arrive on-time is higher than 91.9%? Yes, because the sample is random. Thus, it is representative of the population of flights for the airlines. Yes, because the sample is random and (130)(0.923) and (130)(0.077) are both at least 10. This means the normal model is a good fit for the sampling distribution. Yes, because the sample is random and (130)(0.919) and (130)(0.081) are both at least 10. This means the normal model is a good fit for the sampling distribution.arrow_forwardStay safe and healthy. Exercise: Apply the procedure in testing the hypothesis. A survey was conducted at a community college of 102 randomly selected students who dropped a course in the current semester to learn why students drop courses. Personal drop reasons include financial, transportation, family issues, health issues, and lack of child care. Course drop reasons include reducing ones load, being unprepared for the course, the course was not what was expected, dissatisfaction with teaching, and not getting the desired grade. Work drop reasons include an increase in hours, a change in shift, and obtaining full-time employment. Test whether gender is independent of drop reason at the 1% level of significance. Use "Data_Example and Exercises file". SLIDESMANIA.COM Dec 8, 2021 (Edited Dec 8, 2021) Result ACTUAL/OBSERVED Count of Drop Reason Column Labels - Career Row Labels Course Institution Personal Work Grand Total Female 10 12 18 6 11 57 Male 11 9 6 12 46 Grand Total 21 21 26 12…arrow_forwardAccording to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, 23% of all complaints in 2007 were for identity theft. In that year, Alaska had 321 complaints of identity theft out of 1,432 consumer complaints ("Consumer fraud and," 2008). Does this data provide enough evidence to show that Alaska had a lower proportion of identity theft than 23%? Test at the 5% level. (i) Which of the following statements correctly defines the null hypothesis HO? A. μ = 321 B. p < 0.23 C. p = 0.23 D. μ < 321 Enter letter corresponding to correct answer (ii) Which of the following statements correctly defines the alternative hypothesis HA? A. μ = 321 B. p < 0.23 C. p = 0.23 D. μ < 321 Enter letter corresponding to correct answer (iii) Enter the level of significance α used for this test: Enter in decimal form. Examples of correctly entered answers: 0.01 0.02 0.05 0.10 (iv) Determine pˆiv Determine p^ Enter…arrow_forward
- Procrastination is an issue many college students face and which teachers wish students would overcome. A random sample of 8 volunteers participated in a study where they received counseling about procrastination. Before the counseling, the participants were given an exam about their study habits from the past week. After the counseling, the same students were given an exam about their study habits. A higher test score indicates that the participants are more likely to procrastinate. The before and after scores on a scale from 1 to 10 for each volunteer are given in the table below. Conduct a hypothesis test to see whether there is a difference between the procrastination scores before and after the counseling session. Before: 2, 10, 7, 3, 4, 8, 10, 3 After: 2, 9, 7, 3, 2, 6, 8, 1 hypothesis test neededarrow_forwardA company selling home appliances claims that the accompanying instruction guides are written at a 6th-grade reading level. An English teacher believes that the true figure is higher and with the help of an AP Statistics student runs a hypothesis test. The student randomly picks one page from each of 25 of the company's instruction guides, and the teacher subjects the pages to a standard readability test. The reading levels of the 25 pages are given in the following table: Reading Grade Level Number of Pages 5 6 6 10 7 4 8 2 9 2 10 1 How did you get standard deviation of 1.388? How did you get x bar 6.48? In the given n = 25, but in getting the df your n = 30, why?---------------------YOUR ANSWER: Given: n = 25 arrow_forward…arrow_forwardA Kaiser Family Foundation poll for US adults in 2019 found that 79% of Democrats, 55% of Independents, and 24% of Republicans supported a generic National Health Plan". There were 347 Democrats, 298 Republicans, and 617 Independents surveyed.a.) A political pundit on TV claims that a majority of Independents support a National Health Plan. Do these data provide strong evidence to support this type of statement? Use = 0.05.arrow_forward
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