Quiz--Analyzing Two-Variable Data

Records of sales of umbrellas and amount of rainfall suggests that there is a strong positive relationship between the two variables. What do you think about the situation in terms of explanatory and response variables?

• Amount of sales of umbrellas is an explanatory variable.

• Amount of rainfall is an explanatory variable

• The connection between the variables is not clear

• The two variables are independent of each other.

In a segmented bar graph, how is the data represented?

• Each category has a separate bar

• Each bar is divided into segments representing categories of another variable

• Data is shown as a line graph

• Only totals are represented

What does a segmented bar graph visually illustrate?

• Total counts for each category

• The proportion of each category within a variable

• The joint frequencies of two categorical variables

• Marginal frequencies only

If the segmented bar for one variable shows significantly different segment sizes than another, what can be inferred?

• The variables are independent

• The variables are associated

• The data is incorrect

• The totals are the same

What is the correlation for the following Scatter Plot.

• Weak Positive

• No Correlation

• Strong Negative

• Weak Negative

• Strong Positive

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.B.6

Given the following Scatter Plot, select the option that is most likely the r value.

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.B.6

r = -0.3 is considered to have...

• moderate negative correlation

• weak negative correlation

• no correlation

• strong negative correlation

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.B.6

As x increases, y decreases.

• no correlation
• negative correlation
• correlation coefficient
• positive correlation

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.B.6

Describe the strength and direction of the trend

• Weak Negative Trend

• Strong Negative Trend

• Weak Positive Trend

• Strong Positive Trend

Tags

CCSS.HSS.ID.C.8

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

The correlation coefficient is a number "r" such that: 

• -1<r<1
• -1>r>1
• -1≤r≤1
• -1≥r≤1

Tags

CCSS.HSS.ID.C.8