Question 1

When measure X gets smaller,measure Y also gets smaller in a

Accepted Answer

The answer of When measure X gets smaller,measure Y also...

Question 2

Josh is viewing a scatter diagram and notes that as measure X gets larger,measure Y gets smaller.Thus,this scatter diagram is depicting a

Accepted Answer

The fact that as measure X gets larger, measure Y gets smaller indicates a negative relationship between the variables.

Question 3

A mathematical relationship in which increases in one measure are matched by decreases in the other is a

Accepted Answer

A negative relationship is one in which increases in one measure are matched by decreases in the other.

Question 4

What percent of all cases are found between a standard deviation (SD)of +2 and an SD of -2 on a normal curve?

Accepted Answer

In a normal distribution, approximately 95% of the data falls within two standard deviations (±2 SD) from the mean.

Question 5

The scatter diagram below depicts which type of relationship?

Accepted Answer

The scatter diagram depicts a negative relationship, as the points trend downwards from left to right. This indicates that as one variable increases, the other variable decreases.

Question 6

When measure X gets larger,measure Y also gets larger in a

Accepted Answer

A positive relationship means that as one measure (X) increases, the other measure (Y) also increases. Therefore, as measure X gets larger and measure Y also gets larger, it is indicative of a positive relationship between the two measures.

Question 7

In order to clearly visualize the correlation,Dr.Amott should construct a

Accepted Answer

To visualize a correlation between two variables, the best choice would be a scatter diagram, which displays the relationship between two variables by plotting points on a graph. This would allow Dr. Amott to see if there is a positive, negative, or no correlation between the variables. A histogram and a frequency polygon are used to display the distribution of a single variable, and a frequency distribution is a table that shows how often certain values occur within a data set. None of these would be appropriate for visualizing a correlation between two variables.

Question 8

The type of graph depicted below is a

Accepted Answer

The answer of The type of graph depicted below is...

Question 9

Which of the following is NOT an example of a correlational study?

Accepted Answer

A is not an example of a correlational study because it involves an intervention (implementing a new reading curriculum) rather than simply observing the relationship between two variables. The other options all involve examining the relationship between two variables without any intervention.

Question 10

When two variables vary together in some orderly fashion,they are

Accepted Answer

Correlation refers to the degree to which two variables are related and vary together in a predictable manner. Therefore, when two variables vary together in some orderly fashion, they are correlated. The other options - significant, representative, and causally related - do not necessarily indicate a relationship or predictability between the variables.

Question 11

For a group of students,a researcher obtains their grades in high school and their grades in college and plot the intersection of these paired measures for each person on a graph as a single point.This graph is called a

Accepted Answer

The graph described in the question, where paired measures are plotted as points, is a scatter diagram. It is used to visually analyze the relationship between two variables, in this case high school grades and college grades. The other choices, such as normal curve and frequency distribution, are not appropriate for this type of data analysis. A correlation matrix could be used to display the correlation coefficients between multiple pairs of variables, but it is not mentioned in the question that multiple variables were measured.

Question 12

The scatter diagram below depicts which type of relationship?

Accepted Answer

The answer of The scatter diagram below depicts which type...

Question 13

What percent of all cases are found between an SD of +1 and an SD of -1 on a normal curve?

Accepted Answer

According to the empirical rule, 68% of all cases fall between one standard deviation above and one standard deviation below the mean on a normal distribution.

Question 14

On his psychology test,Miguel must determine what percent of all cases are found between a standard deviation (SD)of +3 and a standard deviation (SD)of -3 on a normal curve.His answer to this problem should be __________ percent.

Accepted Answer

In a normal distribution, approximately 99.7% of data falls within three standard deviations (±3 SD) from the mean. However, since the options provided do not include 99.7%, the closest correct answer is 99%.

Question 15

A graph that plots the intersection of paired measures,that is,the points at which paired X and Y measures cross is called a

Accepted Answer

A scatter diagram plots paired X and Y measures, and shows the intersection of these measures. A histogram, frequency polygon, and frequency distribution all involve plotting a single variable, rather than paired measures.

Question 16

The existence of a consistent,systematic relationship between two events,measures,or variables refers to

Accepted Answer

The existence of a consistent, systematic relationship between two events, measures, or variables is referred to as correlation. Statistical significance refers to the likelihood of obtaining a result purely by chance, a standard deviation is a measure of variability, and a normal curve is a type of distribution used in statistical analyses.

Question 17

The scatter diagram below depicts which type of relationship?

Accepted Answer

The scatter diagram shows a pattern where as the value of the x variable increases, the value of the y variable also increases. This indicates a positive relationship between the two variables.

Question 18

A correlation describes the

Accepted Answer

A correlation measures the strength and direction of the relationship between two variables. It does not describe the probability of an event occurring, the commonality of two variables, or the measures of central tendency for a variable.

Question 19

A mathematical relationship in which increases in one measure are matched by increases in the other (and decreases correspond with decreases)is a

Accepted Answer

A positive relationship is when increases in one measure are matched by increases in the other, and decreases correspond with decreases. This means that as one variable increases, so does the other, and as one decreases, so does the other. This is also known as a direct correlation.

Question 20

Which of the following is NOT an example of a question that could be answered using a correlational study?

Accepted Answer

Correlational studies can determine relationships between two variables, but cannot determine causation. Therefore, questions about whether a new drug causes an improvement in memory would require experimental designs.

Quiz 19: Appendix A: Behavioral Statistics

When measure X gets smaller,measure Y also gets smaller in a

Josh is viewing a scatter diagram and notes that as measure X gets larger,measure Y gets smaller.Thus,this scatter diagram is depicting a

A mathematical relationship in which increases in one measure are matched by decreases in the other is a

What percent of all cases are found between a standard deviation (SD) of +2 and an SD of -2 on a normal curve?

The scatter diagram below depicts which type of relationship?

When measure X gets larger,measure Y also gets larger in a

In order to clearly visualize the correlation,Dr.Amott should construct a

The type of graph depicted below is a

Which of the following is NOT an example of a correlational study?

When two variables vary together in some orderly fashion,they are

For a group of students,a researcher obtains their grades in high school and their grades in college and plot the intersection of these paired measures for each person on a graph as a single point.This graph is called a

The scatter diagram below depicts which type of relationship?

What percent of all cases are found between an SD of +1 and an SD of -1 on a normal curve?

On his psychology test,Miguel must determine what percent of all cases are found between a standard deviation (SD) of +3 and a standard deviation (SD) of -3 on a normal curve.His answer to this problem should be __________ percent.

A graph that plots the intersection of paired measures,that is,the points at which paired X and Y measures cross is called a

The existence of a consistent,systematic relationship between two events,measures,or variables refers to

The scatter diagram below depicts which type of relationship?

A correlation describes the

A mathematical relationship in which increases in one measure are matched by increases in the other (and decreases correspond with decreases) is a

Which of the following is NOT an example of a question that could be answered using a correlational study?