1.
Data on which each of two variables, where each value of one of the variables is paired with a value of the other variable is called...
Correct Answer
B. Bivariate data
Explanation
Bivariate data refers to a set of data that involves two variables, where each value of one variable is paired with a value of the other variable. In this case, the data consists of pairs of values from two variables. Therefore, the correct answer is bivariate data.
2.
Which of these is used to represent a bivariate data?
Correct Answer
B. Scatter plot
Explanation
A scatter plot is used to represent bivariate data. It is a graphical representation that displays the relationship between two variables. It consists of points on a graph, where each point represents a pair of values for the two variables. The position of each point on the graph indicates the values of the variables, and the pattern formed by the points helps to identify any correlation or relationship between the variables. Therefore, a scatter plot is the correct choice for representing bivariate data.
3.
What can be used to model the relationship between quantitative variables and make predictions?
Correct Answer
A. Regression
Explanation
Regression analysis is used to model the relationship between quantitative variables and make predictions. It is a statistical technique that helps to understand how the dependent variable changes with the independent variables. By fitting a regression line to the data points, it allows us to make predictions about the dependent variable based on the values of the independent variables. Therefore, regression is the correct answer as it is specifically designed for modeling relationships and making predictions between quantitative variables.
4.
A type of table in a matrix format that displays the frequency distribution variables is...
Correct Answer
C. Contingency table
Explanation
A contingency table is a type of table in a matrix format that displays the frequency distribution of variables. It is used to analyze the relationship between two or more categorical variables. Each cell in the table represents a combination of values from the variables being studied, and the frequency or count of observations falling into each combination is displayed. This allows for easy comparison and identification of patterns or associations between the variables.
5.
A table in which each variable has only two levels is called...
Correct Answer
D. 2x2
Explanation
A table in which each variable has only two levels is called a 2x2 table. This means that there are two variables, each with two levels or categories. The table would have two rows and two columns, representing the different combinations of the variables.
6.
A statistical test applied to sets of categorical data to evaluate how likely it is that any observed difference between the sets arose by chance is called...
Correct Answer
A. Pearson's chi-squared test
Explanation
Pearson's chi-squared test is a statistical test used to determine the likelihood that any observed difference between sets of categorical data is due to chance. It compares the observed frequencies of categories with the expected frequencies, assuming there is no association between the variables. By calculating the chi-squared statistic and comparing it to a critical value, the test determines whether the observed difference is statistically significant or can be attributed to random variation. This test is commonly used in fields like social sciences, biology, and market research to analyze categorical data and assess the relationship between variables.
7.
A test that examines the association of two categorical variables is...
Correct Answer
B. Barnard's test
Explanation
Barnard's test is a statistical test that examines the association between two categorical variables. It is commonly used when the sample size is small or when the assumptions of other tests, such as the chi-square test, are not met. Barnard's test calculates the probability of observing the data, given the null hypothesis of no association between the variables. It is a non-parametric test that does not rely on any distributional assumptions and is suitable for analyzing contingency tables.
8.
What kind of test is used to examine the significance of the contingency between two kinds of classification?
Correct Answer
A. Fisher's exact test
Explanation
Fisher's exact test is used to examine the significance of the contingency between two kinds of classification. It is a statistical test that is used when the sample size is small and the assumptions of the chi-squared test are not met. It calculates the exact probability of obtaining the observed distribution of data, assuming that the null hypothesis is true. It is commonly used in medical research and other fields where small sample sizes are common.
9.
The rows in a contingency table are referred to as...
Correct Answer
D. Stubs
Explanation
In a contingency table, the rows represent the different categories or groups being compared. These categories are often referred to as "stubs" because they are listed along the side of the table and provide a framework for organizing and analyzing the data. The term "stubs" is commonly used in statistical analysis to describe the rows or categories in a contingency table.
10.
The columns in a contingency table are referred to as...
Correct Answer
B. Cuts
Explanation
The correct answer is "Cuts" because in a contingency table, the columns represent different categories or groups being compared. Each column is a "cut" of the data, dividing it based on a specific variable or factor. Therefore, the term "cuts" accurately describes the columns in a contingency table.