Practical Skills

correlation measures _______________ among variables.

• Direction of relationship

• intensity of relationship

• direction & intensity of relationship

• Cause & effect relationship

What enable us to examine the relationship between two variables in a scatter diagram?

• degree of closeness of the scatter points

• overall direction of the scatter points

• degree of closeness of the scatter points and their overall direction

• None of these

The value of simple correlation coefficient lies between

• 0 and +1

• 0 and -1

• +1 and -1

• 0 and 100

Which method of correlation is confined to measure linear relationship among variables?

• Scatter diagram

• Karl Pearson’s coefficient of correlation

• Spearman’s rank correlation

• Both Karl Pearson’s coefficient of correlation & Spearman’s rank correlation

A line on a scatter plot which can be drawn near the points to more clearly show the trend between two sets of data is called

• Scatter Plots

• Outlier

• Line of best fit

• Regression LIne

This is a formula for finding correlation in which method?

• Scatter Diagram

• Karl Pearson;s correlation coefficient

• Spearman;s Rank corelation

• All of these

This is a formula for finding correlation in which method?

• Scatter Diagram

• Karl Pearson;s correlation coefficient

• Spearman;s Rank corelation

• All of these

What a hypothesis?

• an explanation about what you observed

• using your 5 senses to gather data

• the thing changed on purpose in the experiment

• an educated guess about what will happen in the experiment.

When is a hypothesis written?

• before you decide on a question

• after the experiment

• after the conclusion

• before the experiment

A hypothesis is never wrong.

• True

• False