the primary data source
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
- A New York Times poll asked 1,850 adults in the United States a series of questions to find out their view on the U.S. economy. The 1,850 adults make up:
- the population
- the statistical inference
- the secondary data source
- the primary data source
- the sample
2. A sample of workers who completed training were asked to rate the training according to the following classification: outstanding, very good, fair, or poor. The level of measurement used is:
- nominal
- ordinal
- comprehensive
- interval
- ratio
3. The following frequency distribution displays the weekly sales of a certain brand of television at an electronics store.
|
Number Sold |
Frequency |
|
1-5 |
3 |
|
6-10 |
7 |
|
11-15 |
14 |
|
16-20 |
22 |
|
21-25 |
4 |
What is the width of each class in this distribution?
- 1
- 2
- 5
- 10
- 25
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