Solutions to Exercises


  1. a. quantitative - discrete
    b. quantitative - continuous
    c. qualitative
    d. quantitative - continuous
    e. quantitative - discrete
    f. qualitative
    g. qualitative
    h. quantitative - continuous i. quantitative - continuous
    j. quantitative - discrete


  2. b. 5.00%
    c. 93.33%


  3. a. Children who take ski and snowboard lessons
    b. A group of these children
    c. The population average
    d. The sample average
    e. X = the age of one child who takes the first ski or snowboard lesson
    f. A value for X, such as 3, 7, etc.


  4. a. The clients of the insurance companies
    b. A group of the clients
    c. The average yearly health costs of the all health insurance clients
    d. The average yearly health costs of the clients in the sample
    e. X = the health insurance cost for a year for one client
    f. A value for X, such as $140, $725, $2143 etc.


  5. a. All the clients of the counselor
    b. A group of the clients
    c. The proportion of all her clients who stay married
    d. The proportion of the sample who stay married
    e. X = the number of couples who stay married
    f . yes, no

  6. a. All people (maybe in a certain geographic area, such as the United States)
    b. A group of the people
    c. The proportion of all people who will buy the product
    d. The proportion of the sample who will buy the product
    e. X = the number of people who will buy it
    f. buy, not buy



  8. D

  9. B


  10. a. Convenience
    b. Cluster
    c. Stratified
    d. Systematic
    e. Simple Random