Natasha Awada, Paul La Rondie, Laurie Buchanan and, Jill Stevens Solutions for Chapter: Representing Data: Statistics for Univariate Data, Exercise 10: Exercise 6A

Classify the following as either discrete or continuous data. The number of laptop bags that you have.

Ben is studying the average height of students who attend his school. Choose from convenience, simple random, systematic, stratified or quota to classify each of the following sampling techniques that Ben might use.
A random name is chosen. Starting with that student, every ${50}^{\mathrm{th}}$ student is chosen until $80$ students are included in the sample.

Ben is studying the average height of students who attend his school. Choose from convenience, simple random, systematic, stratified or quota to classify each of the following sampling techniques that Ben might use.
A completely random method is used to select $100$ students. Each student has the same probability of being chosen at any stage of the sampling process.

Ben is studying the average height of students who attend his school. Choose from convenience, simple random, systematic, stratified or quota to classify each of the following sampling techniques that Ben might use.
The population of the school consists of $70\%$mathematicians and $30\%$ non-mathematicians. Seven mathematicians and three non-mathematicians are chosen from each grade.

 Determine the type of sampling technique used in each case. Choose from convenience, simple random, systematic, stratified or quota sample.

A local newspaper selects to interview people at the seaside. It specifies that $90\%$ of those interviewed must be local residents and $10\%$ must be tourists.

 Determine the type of sampling technique used in each case. Choose from convenience, simple random, systematic, stratified or quota sample.
A DJ chooses every fourth song on a playlist.

Determine the type of sampling technique used in each case. Choose from convenience, simple random, systematic, stratified or quota sample.
The mathematics club uses a computer generate $50$ random numbers and then picks students whose names correspond to the numbers.

This set of raw data shows the waiting time, in minutes, at a fast food restaurant.
$13,1.3,8,5,9.25,10,7.1,3,2,9,18,15,6,8,2.25,1,7,12,9,14,16,11,7,8,6.8,11,20,5,4.2,3.4$
Is the data discrete or continuous?