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What happens if you run a correlation analysis on non-linear data

It does not matter if the data is linear or non-linear, you will achieve the same result.

The result can be interpreted as a non-linear correlation coefficient.

The result will be invalid (correct)

People don't worry about linearity, the mechanisms of the inferential statistics looks after the fact the data is linear or non-linear.

What result do you see when variables are completely independent of each other.

A zero correlation coefficient (correct)

You will see a positive or negative correlation

The result will be invalid

The result will be -1

Which of the following is FALSE

A correlation of .198 is a small

A correlation of .87 is a large

A correlation of .05 is a small

A correlation of .3007 is a medium (correct)

We are measuring a correlation between water and H2O molecules, which we expect to have a high correlation. Which of the following is TRUE?

A correlation of .7 is low Signup and view all the answers

For each of the following, indicate whether you would expect a positive or a nega- tive correlation. a. Model year and price for a used Honda b. IQ and grade point average for high school students c. Daily high temperature and daily energy consumption for 30 winter days in New York City

a. positive, b. positive, c. negative Signup and view all the answers

he data points would be clustered more closely around a straight line for a corre- lation of -0.80 than for a correlation of +0.05. (True or false?)

True Signup and view all the answers

If the data points are clustered close to a line that slopes up from left to right, then a good estimate of the correlation would be +0.90. (True or false?)

True Signup and view all the answers

If a scatter plot shows a set of data points that form a circular pattern, the correla- tion should be near zero. (True or false?)

True Signup and view all the answers

Describe what is measured by a Pearson correlation.

The Pearson correlation measures the degree and direction of the linear relationship between two variables. · Signup and view all the answers

Can SP ever have a value less than zero?

True Signup and view all the answers

Which of the following statements best describes the concept of "regression toward the mean" in statistical analysis?

It refers to the tendency of data points to move toward the mean or average value over time. Signup and view all the answers

In null hypothesis testing, the null hypothesis (H0) typically represents:

The default or status quo hypothesis that there is no effect or relationship. Signup and view all the answers

In the context of correlation analysis, why is it especially important for the correlation value to be relatively high when dealing with low sample sizes?

Low sample sizes are more likely to produce unreliable correlation estimates. Signup and view all the answers

Which of the following is FALSE.

A Cronbach Alpha score of 0 means the variables have a reliable relationship. Signup and view all the answers

Increasing the number of items on a scale _____ the Cronbach's Alpha.

Increases Signup and view all the answers

Which of the following is correct?

A Cronbach Alpha level .66 is questionable Signup and view all the answers

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Questions and Answers

What happens if you run a correlation analysis on non-linear data

What result do you see when variables are completely independent of each other.

Which of the following is FALSE

We are measuring a correlation between water and H2O molecules, which we expect to have a high correlation. Which of the following is TRUE?

For each of the following, indicate whether you would expect a positive or a nega- tive correlation. a. Model year and price for a used Honda b. IQ and grade point average for high school students c. Daily high temperature and daily energy consumption for 30 winter days in New York City

he data points would be clustered more closely around a straight line for a corre- lation of -0.80 than for a correlation of +0.05. (True or false?)

If the data points are clustered close to a line that slopes up from left to right, then a good estimate of the correlation would be +0.90. (True or false?)

If a scatter plot shows a set of data points that form a circular pattern, the correla- tion should be near zero. (True or false?)

Describe what is measured by a Pearson correlation.

Can SP ever have a value less than zero?

Which of the following statements best describes the concept of "regression toward the mean" in statistical analysis?

In null hypothesis testing, the null hypothesis (H0) typically represents:

In the context of correlation analysis, why is it especially important for the correlation value to be relatively high when dealing with low sample sizes?

Which of the following is FALSE.

Increasing the number of items on a scale _____ the Cronbach's Alpha.

Which of the following is correct?

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