Stats final Review

You record the age, marital status, and earned income of a sample of 1463 women.  The number and type of variables you have recorded is

• 3 quantitative, 0 categorical
• 4 quantitative, 0 categorical
• 3 quantitative, 1 categorical
• 2 quantitative, 2 categorical

• I and IV
• II and IV
• I and II
• II and III

What type of graph is this?

• Bar Graph

• Histogram

• Pictograph

• Dot Plot

Is the Cars dot plot skewed left or right?

• left
• right

Tags

CCSS.HSS.ID.A.1

CCSS.HSS.ID.A.3

• the spread of 5th period is greater than 2nd period
• the spread of 2nd period is greater than 5th period
• 5th period is skewed right

Tags

CCSS.HSS.ID.A.1

CCSS.HSS.ID.A.3

CCSS.HSS.ID.A.2

Is the following variable numerical or categorical?
Percentage of successful serves during a volleyball game.

• Numerical
• Categorical

Is the following variable numerical or categorical?
Average speed of the first serve in tennis.

• Numerical
• Categorical

Is the following variable numerical or categorical?
The type of engine used in each car during a NASCAR race. 

• Numerical
• Categorical

An advantage of experiments over observational studies is

• An experiment can provide evidence of cause and effect.
• An experiment can compare two or more groups.
• An experiment can include explanatory and response variables.
• An experiment incorporates volunteers.

The Minnesota Study of Twins Reared Apart investigated whether attributes of twins are related to heredity or environment. The researchers assessed 56 pairs of identical twins reared apart as well as several hundred identical twins reared apart.  They compared the similarities of the twins in both groups.
Is this an experiment or an observational study?

• Experiment
• Observational study