Questions from Applied Statistics

Q: Driving without a seat belt is not risky. I’ve done it

Driving without a seat belt is not risky. I’ve done it for 25 years without an accident.” This best illustrates which fallacy? a. Unconscious bias. b. Conclusion from a small sample. c. Post hoc reas...

Q: Can people really identify their favorite brand of cola? Volunteers tasted

Can people really identify their favorite brand of cola? Volunteers tasted Coke, Pepsi, Diet Coke, and Diet Pepsi, with the results shown below. Research question: At α = .05, is the cor...

Q: A survey of randomly chosen new students at a certain university

A survey of randomly chosen new students at a certain university revealed the data below concerning the main reason for choosing this university instead of another. Research question: At Î&plus...

Q: A survey of 189 statistics students asked the age of car usually

A survey of 189 statistics students asked the age of car usually driven and the student’s political orientation. The car age was a numerical variable, which was converted into ordina...

Q: The actual distribution of car colors for 2006 model car buyers is

The actual distribution of car colors for 2006 model car buyers is shown below. Based on the sample of 200 car buyers for 2012 model vehicles, use the multinomial chi-square GOF test at α...

Q: Make a scatter plot of Y against X. Discuss what it

Make a scatter plot of Y against X. Discuss what it tells you. Midterm and Final Exam Scores for Business Statistics Students Fall Semester 2011 (n = 58 students) Midterm Exam Score â€&br...

Q: Are these cross-sectional data or time-series data?

Are these cross-sectional data or time-series data? What is the unit of observation (e.g., firm, individual, year)?

Q: Prof. Green’s multiple-choice exam had 50 questions with the

Prof. Green’s multiple-choice exam had 50 questions with the distribution of correct answers shown below. Research question: At α = .05, can you reject the hypothesis that Green’s exam answers came fr...

Q: Oxnard Kortholt, Ltd., employs 50 workers. Research question:

Oxnard Kortholt, Ltd., employs 50 workers. Research question: At α = .05, do Oxnard employees differ significantly from the national percent distribution?

Q: In a four-digit lottery, each of the four digits

In a four-digit lottery, each of the four digits is supposed to have the same probability of occurrence. The table shows the frequency of occurrence of each digit for 89 consecutive daily four digit d...