The chancellor of a major university was concerned about alcohol abuse on her campus and wanted to find out the portion of students at her university who visited campus bars every weekend. Her advisor took a random sample of 250 students. The total number of students in the sample who visited campus bars every weekend is an example of :Question 23Answera. a categorical random variable.b. a discrete random variable.c.a parameter.d.a continuous random variable
Question
The chancellor of a major university was concerned about alcohol abuse on her campus and wanted to find out the portion of students at her university who visited campus bars every weekend. Her advisor took a random sample of 250 students. The total number of students in the sample who visited campus bars every weekend is an example of :Question 23Answera. a categorical random variable.b. a discrete random variable.c.a parameter.d.a continuous random variable
Solution
The answer is b. a discrete random variable.
Here's why:
A random variable is a variable whose possible values are numerical outcomes of a random phenomenon. There are two types of random variables, discrete and continuous.
a) A categorical random variable would be applicable if the data could be divided into categories. For example, if the students were categorized as "visits bars" and "does not visit bars".
b) A discrete random variable is a variable that can take on a countable number of values. The number of students who visit campus bars every weekend is countable, hence it is a discrete random variable.
c) A parameter is a numerical characteristic of a population. In this case, the total number of students who visit campus bars every weekend is not a characteristic of the entire student population, but rather a characteristic of the sample.
d) A continuous random variable is a variable that can take on an infinite number of values within a certain range. The number of students who visit campus bars every weekend is not continuous because it cannot take on an infinite number of values.
Similar Questions
The chancellor of a major university was concerned about alcohol abuse on her campus and wanted to find out the portion of students at her university who visited campus bars every weekend. Her advisor took a random sample of 250 students. The total number of students in the sample who visited campus bars every weekend is an example of :
A manager of a company was concerned about the quality of products produced through a newly purchased machinery. To investigate the percentage of defective items, she collected a random sample of 200 products produced by this machine. The total number of defective items found in the sample is an example of:Question 27Answera.a continuous random variableb.a discrete random variablec.a categorical random variabled.a parameter
The number of customers that enter a store during one day is an example ofQuestion 4Select one:a.a discrete random variableb.a continuous random variablec.either a continuous or a discrete random variable, depending on the number of the customersd.either a continuous or a discrete random variable, depending on the gender of the customers
Each student at a school has a student identification number. Counselors have a computer generate random identification numbers, and the students associated with those numbers are asked to take a survey.What type of sample is this?Choose 1 answer:Choose 1 answer:(Choice A) Simple random sampleASimple random sample(Choice B) Stratified random sampleBStratified random sample(Choice C) Cluster random sampleCCluster random sample(Choice D) Systematic random sampleDSystematic random sample(Choice E) None of the aboveENone of the above
The number of patrons arriving at a restaurant between 5:00 p.m. and 6:00 p.m is a continuous random variable.Group of answer choicesTrueFalse
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.