1 Statistics is the science of collecting, organizing, summarizing, and analyzing information to draw conclusions or answer questions. Also, statistics involves providing a measure of confidence in any conclusions.
3 An individual is a person or onject that is a member of the population being studied.
5 A statistic is a numerical summary of a sample. A parameter is a numerical summary of a population.
7 Following the 2010 national midterm election, 18% of the governors of the 50 United States were female. Parameter.
9 In a national survey of 1300 high school students (grades 9 to 12), 32% of respondents reported that someone had bullied them at school. Statistic.
11 Ty Cobb is one of major league baseball’s greatesst hitters of all time, with a career batting average of .366. Parameter
13 A study of 6076 adults in public rest rooms (in Atlanta, Chicago, NYC, and San Fran) found that 23% did not wash their hands before exiting. Statistic.
15 Nation of origin is a qualitative variable.
17 Grams of carbohydrates is quantitative variable.
19 Number of unpopped kernels in a bag of ACT microwave popcorn is a quantitative variable.
21 One’s phone number is a qualitative variable.
23 Goals scored in a season by a soccer player is an example of a discrete variable.
25 Length (in minutes) of a country song is a continuous variable.
27 Temperature of a randomly selected day in Memphis, Tennessee is a continuous variable.
29 Points scored in an NCAA basketball game are an example of a discrete variable.
31 One’s nation of origin is considered a nominal variable.
33 Volume of water used by a house hold is a day is an example of a ratio variable.
35 Highest degree conferred is a nominal variable.
37 Assesed value of a house is ratio variable.
39 The population for this scenario is American 17 year olds, whereas the sample is the specific 1028 teenagers that were surveyed.
Switching to 1.2 questions
11 This scenario is clearly an example of an experiment because the individual is trying to influence the outcome of the study.
13 This scenario is an example of an observational study because the individual is simply noting the results of the study rather than trying to influence them.