QUIZ (RANDOM SAMPLING)

For a school project, three students need to produce a sample of students at their school. Which of the following methods leads to a random sample?

• Numbering all the students and produce the sample from a random list of numbers

• Calling for volunteers at the school assembly

• Calling for volunteers via social media

• Asking each of their friends to name three further friend2

At a local golf club, there are 50 male members and 30 female members. A representative sample of 10 random male members and 6 random female members is chosen. Which of the following is the sampling method used?

• simple random sampling

• systematic random sampling

• stratified sampling

involves simply asking anyone who happens to be there if they would like to participate.  For instance, asking students in the library if they would be willing to complete a survey.

• random sampling

• convenience sampling

• volunteer sampling

• snowball sampling

Which of the following is an example of categorical data?

• Height

• Number of Credits Earned

• Grade in School

• Grade Point Average

Which of the following is an example of a quantitative variable?

• Supervising Manager

• Hours Worked

• Pay Scale Group

• Certification

Look at each data set's standard deviation.

Set 1: 15.9

Set 2: 14.64

Set 3: 17.88

Which set of data has values that are closer in relation to the mean value of the data?

• Set 1

• Set 2

• Set 3

• Not enough information is provided

Answer explanation

F(83) falls within the range of 80-85. Within that range there is 5 numbers. There for the value of F(83) is 5 according to this Histogram.

$f\left(x\right)=5x-12$ What is $f\left(-4\right)$

• -32

• -3

• -12

• 3