correlation intro

The following are other names for a scatter plot EXCEPT:

• xy plot

• line graph

• scatter grams

• scatter diagrams

In constructing a scatter plot, which of the variables should assume the values of x-coordinate?

• Consistent variable

• Independent variable
• Dependent variable
• Confounding variable

Data that involve two variables are called______.

• bivariate data

• univariate data

• trivariate data

• multivariate

A nutritionist advised his patient that few hours of sleep makes a person heavier according to studies. What are the variables presented?

• hours of sleep

• weight and calorie intake

• hours of sleep and weight

• protein consumption and visceral fat gain

describe the strenghts and direction of the given scatter plot.

• a.    Strong positive correlation

• a.    Weak positive correlation

• a.    Strong negative correlation

• a.    weak positive correlation

A

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If the points on the scatter graph rise from left to right, then the variable involved has a ______ correlation.

• moderate

• negative

• positive

• zero

Estimate the strength of correlation of the scatter plot on the right

• strong negative

• strong positive

• weak negative

• weak positive