Question

1. The characteristic of interest for the elements is called a(n)

A	sample
B	quantitative data set

C

variable or random variable

D

histogram

2. A statistics professor asked students in a class their ages. On the basis of this information, the professor states that with certain accuracy, the average age of all the students in the university is 21.3 years. This is an example of

A	a census
B	descriptive statistics

C	an experiment
D	statistical inference

3.

A survey to collect data on the entire statistical population is

A	a census
B	a sample

C	descriptive statistics
D	an inference

4.

In a data set, the number of elements is usually the same as the number of

A	independent variables
B	observations

C	nominal variables
D	dependent variables

5.

In a questionnaire, respondents are asked to mark their gender as male or female. Gender is an example of the

	ordinal scale
	nominal scale

	ratio scale
	interval scale

6.

In a random sample of 200 items, 5 items were defective. The point estimate of the percentage of defective items in the population is

	5.0%
	2.5%

	20%
	10.0%

7.

Recoreded annual income of individuals is an example of

	categorical data
	either categorical or quantitative data

	I do not see the right answer
	quantitative data

8.

The collection of all elements of interest in a particular study is

	a statistical population
	the sampling

	statistical inference
	descriptive statistics

9.

A cumulative frequency distribution shows

	the number of data items with values less than the upper limit of each class
	the proportion of data items with values less than or equal to the upper limit of each class

	the percentage of data items with values more than upper limits of each class
	the percentage of data items within each class

Answer 1