Question: Washington University obtained word counts from the most popular novels of the past five years.

Answer: There does not appear to be a potential to create a bias. The organization would not gain from putting a spin on the results.

Question: Given the data in the table​ below, what issue can be addressed by conducting a statistical analysis of the pulse​ rates?

Pulse Rate​ (beats per​ minute)

Male

62

74

65

60

61

Female

64

64

72

85

80

Answer: The data can be used to address the issue of whether males or females have pulse rates with the same average​ (mean) values

Question: Several studies showed that after eating 4 servings of dairy a day​, subjects had lowered risk of osteoperosis. A dairy farmer’s organization financed this research. What is wrong with this​ study?

Answer: Self-interest study

Question: Based on a study of car accidents in winter of men and women who live in different parts of the country​, a researcher concludes that living in the north causes people to drive badly. Do you agree with this​ conclusion?

Answer: No. There may be a relationship between car accidents and geographical location​, but that does not mean that one causes the other.

Question: A report about the decline of Western investment in third world countries included this: “After years of daily flights comma several European airlines halted passenger service. Foreign investment fell 350 percent during the 1990 s.” What is wrong with this​ statement?

Answer: If foreign investment fell by 100%, it would be totally eliminated, so it is not possible for it to fall by more that 100%

Question:

Answer: All percentages of success should be multiples of 25. The given percentages cannot be correct.

Question: A sample of seniors is selected and it is found that 45% own a vehicle

Answer: Statistic because the value is a numerical measurement describing characteristic of a sample

Question: In a test of method of gender selection, 742 couples used the XSORT method and 415 of them had baby girls

Answer: A discrete data set because there are a finite number of possible values

Question: Number of pieces of lumber used to make a deck is 113

Answer: Discrete

Question: Research is conducted to determine if there is a relation between lung capacity and proximity to coal mines

Answer: Observational study