On a survey respondents are asked how likely they are, on a scale from 1 to 5, t
ID: 1154291 • Letter: O
Question
On a survey respondents are asked how likely they are, on a scale from 1 to 5, to buy a new smart phone in the next year. This question will yield _____ data.
A) quantitative
B) binary
C) nominal
D) ordinal
Which of the following is not an example of a quantitative variable?
A) The weight of a box of cereal
B) Your social security number
C) The time it takes to drive from Greensboro to Raleigh
D)The price of a concert ticket
The answer to the question “Do you own a car?” is a _____ variable.
A)qualitative, binary
B) qualitative, nominal
C) quantitative, discrete
D) quantitative, continuous
Statistical inference is the process of _____.
A) randomly selecting a sample from the population
B) using data from a sample to learn about the population
C) collecting and summarizing data from a sample
D) using data from a population to learn about sample statistics
The collection of all possible observations of interest is called the _____
A) sample
B) population
C) statistic
D) parameter
In a sample of 20 students, 7 are economics majors, 4 are psychology majors, 6 are math majors and 3 are English majors. What is the relative frequency of psychology majors?
A) 0.20
B) 0.25
C) 4
D) 16
In a sample of 20 students you observe 4 different choices of college major. What graph can you use to display the distribution of college major in your sample?
A) A histogram
B) A bar chart
C) A scatter plot
D)None of the above
You sample 12 of your friends and ask them how many cash they currently have in their wallet. The results (in dollars) are:
11 44 2 25 5 22 35 16 8 15 31 18
What is the range of the amount of cash in your sample?
A) 12
B) 35
C) 44
D) 42
Which of the following is not a measure of dispersion?
A) Range
B) Mode
C) Standard deviation
D) Variance
A sample of 8 students was asked how often they used campus dining facilities during the past month. The responses were as follows.
4 1 6 1 2 10 2 6
The sample mean and Median
Explanation / Answer
1. Since the response of the question will be on the basis of scales, the question will yield ordinal date. Hence the correct answer is (D).
2. The social security number is not an example of a quantitative variable as although it is a number, it does not have any comparable quantitative value. Hence the correct answer is (B).
3. The answer to the question "Do you own a car?" is a binary and qualitative variable because it has only two values i.e yes and no. Hence the correct answer is (A).
4. Statistical inference is the process of using data from a sample to learn about the population. Hence the correct answer is (B).
5. The collection of all possible observations of interest is called the population. Hence the correct answer is (B).
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