Question 1 The social security number is considered what type of variable?
a a quantitative variable
b either a quantitative or a qualitative variable
c an exchange variable
d a categorical or qualitative variable
Question 2 In a random sample of 200 items, five items were defective. An estimate of the percentage of defective items in the population is ___.
a 5.0%
b 2.5%
c 200
d 10.0%
Question 3 In a sample of 400 students in a university, 80, or 20%, are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of ___.
a a sample
b a population
c statistical inference
d descriptive statistics
Question 4 Sample is defined as (a) _____.
a size of fifty or larger
b subset of a population
c biased
d descriptive statistics
Question 5 All the data collected in a particular study are referred to as the ___.
a inference
b variable
c data set
d none of the above
Question 6 GPA is an example of a variable that uses ____.
a the ratio scale
b the interval scale
c the ordinal scale
d either the ratio or the ordinal scale
Question 7 All the data collected in a particular survey is referred to as a ____.
a table
b variable
c data set
d population
Question 8 In a random sample of 100 items, five items were defective. An estimate of the percentage of non-defective items in the population is ____.
a 5%
b 2.5%
c 200
d 95%
Question 9 You surveyed the first 20 students visiting Monday morning at the student center regarding their weekend study habits. This is an example of a ____.
a representative sample
b population
c biased sample
d random sample
Question 10 In a questionnaire, respondents were asked whether they ever served in the military. Respondents answering yes or no is an example of a(n) ____.
a ordinal scale
b nominal scale
c ratio scale
d interval scale