Statistical Methods Quiz

One of the statistical methods used to describe the relationship between two variables is...

• Independent diagram

• Correlation diagram

• Bivariate variable

• Scatter diagram

• Dependent variable

The difference between independent and dependent variables in bivariate data is...

• Dependent variable is also called free variable

• Independent variable affects the dependent variable

• Independent variable is influenced by the dependent variable

• Independent variable cannot be measured

• Dependent variable can be measured and observed

Consider the following statements: 1. A positive relationship in a diagram indicates that the values of independent and dependent variables tend to move in the same direction. 2. The trend of data that forms a straight line is also called a curve. 3. Nonlinear data trends mean that data points do not form a straight line. 4. The relationship between study time and exam scores is a negative relationship. Based on the above statements, the TRUE statements are...

• 3 and 4

• 2 and 3

• 1 and 3

• 1 and 4

• 2 and 4

A negative relationship between two variables is...

• The relationship between two variables is nonlinear

• The values of independent and dependent variables tend to move in the same direction

• There is no relationship between two variables

• The relationship between two variables is linear

• The values of independent and dependent variables tend to move in opposite directions

The correct statement according to the scatter diagram showing the relationship between weight and height of several teenagers is...

• Weight tends to increase with a decrease in height.

• Weight tends to increase with an increase in height.

• The relationship between weight and height is uncertain.

• Weight and height vary according to the age of teenagers.

• Weight tends to decrease with an increase in height.

The following table represents types of correlation...

• Positive correlation curve

• No correlation

• Positive correlation

• Negative correlation

• Negative correlation curve

What type of correlation is formed in the scatter diagram?

• No correlation

• Positive correlation curve

• Negative linear correlation

• Positive linear correlation

• Negative correlation curve

The scatter diagram that shows a positive correlation between x and y is ...

• a)

• b)

• c)

• d)

• e)

The following table provides information about sugar content (grams) and calorie count in one serving from 13 cereal brand samples. The correct statement is ... (more than one answer)

• 20 grams of sugar contains 190 calories

• Sugar is the independent variable

• 12 grams of sugar contains 200 calories

• The highest dependent value is 200

• Calories are the independent variable

In your opinion, which diagram shows a stronger correlation?

• a)

• b)