Exam 1 Review

Which score has the highest relative position: A score of 40 on a test with a mean of 31 and s=9, or, A score of 3.8 on a test with a mean of 2.5 and s=1.2, or a score of 491 on a test with a mean of 445 and s=46?

• A score of 491

• A score of 40

• A score of 3.8

• Correct answer not given

Use the following frequency distribution to determine the class limits of the fourth class

• lower limit: 23

  upper limit: 29

• lower limit: 30

  upper limit: 37

• lower limit: 30

  upper limit: 36

• lower limit: 23

  Upper limit: 30

The April precipitation amounts (in inches) for 10 cities are listed below. Are these data Discrete or Continuous? 2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8

• Continuous

• Discrete

The April precipitation amounts (in inches) for 10 cities are listed below. Do these data represent a sample or a population? 2.0, 3.2, 1.8, 2.9, 0.9, 4.0, 3.3, 2.9, 3.6, 0.8

• Population

• Sample

A data set has a sample size of 70 with a mean of 450 and standard deviation of 62. Approximately how many observations lie between 388 and 512?

• 67%

• 48%

• 68%

• 35%

Quantitative or Qualitative: The bank account numbers of the students in a class

• Qualitative

• Quantitative

• Correct answer not given

A meteorologist constructs a graph showing the total precipitation in Denver, Colorado in each of the months of 2020. Does this involve descriptive statistics or inferential statistics?

• Descriptive Statistics

• Inferential Statistics

The April precipitation amounts (in inches) for 10 cities are listed below. Which grouping method should be used? 2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8

• Single Value Grouping

• Limit Grouping

• Cut-point Grouping

• Correct grouping not provided.

The graph represents the winners of the State Tennis Tournament women's singles title for years 1986 - 2005. What percent of the winnings is by Graf?

• 10%

• 45%

• 5%

• 30%

An educational researcher used school records to determine that, in one school district, 84% of children living in two-parent homes graduated high school while 75% of children living in single-parent homes graduated high school. What type of study is this?

• Observational Study

• Designed Experiment

• Correct answer not provided