Algebra Unit 7 Pre-Test REVIEW

Data distributions are show for the temperature of two groups of fish in the Chattahoochee River. Which summary statistics should be use to compare the two data sets and why?

• The median and the interquartile range because the data sets are normally distributed

• The median and the interquartile range because the data sets are skewed

• The mean and the standard deviation because the data sets are normally distributed

• The mean and the standard deviation because the data sets are skewed

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

Data distributions are show for the weight of two groups of people in the Dallas, Texas region. Which summary statistics should be use to compare the two data sets and why?

• The median and the interquartile range because the data sets are normally distributed

• The median and the interquartile range because the data sets are skewed

• The mean and the standard deviation because the data sets are normally distributed

• The men and the standard deviation because the data sets are skewed

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

The "1.5 x IQR" rule states that a data value is potentially an outlier if its distance below the first quartile or above the third quartile is greater than 1.5 times the interquartile range. 

Which of the following box plots represent a data set with a potential outlier, as identified by the "1.5 × IQR" rule?  (Select two that apply)

• 
• 
• 
• 

A researcher finds that the number of baby pools sold tends to increase with the outdoor temperature, and that no significant external factors are responsible for this relationship. What can the researcher conclude about the relationship between the outdoor temperature and the number of baby pools sold?

• There is neither causation nor correlation

• There is both correlation and causation

• There is correlation but not causation

• There is causation but not correlation

Tags

CCSS.HSS.ID.C.9

A researcher measured the height and foot length of a group of kangaroos at a rescue park in Australia. He recorded the data shown in the table below.

(Select two that apply)

• The correlation coefficient is 0.93

• The correlation coefficient is 0.96

• There is a strong linear relation between height and foot length with a positive slope.

• There is a weak linear relation between height and foot length with a positive slope.

Tags

CCSS.HSF-LE.A.1B

The number of fish that Kia and Jack have caught over the past week is shown.

(Select 2 that apply)

• Kia's set of data has a higher standard deviation than Jack's.

• Jack's data has a higher mean than Kia's

• Kia's set of data has a higher median than Jack's

• Jack's set of data has a higher interquartile range than Kia's

Tags

CCSS.7.SP.B.4

A scientist studied the relationship between the number of children in a family (x) and the total electricity bill, y. She modeled the relationship with a scatter plot and used the equation y = 50 + 25x for the regression line.

What is the meaning of the slope and y-intercept of this regression line?

• The slope is 25. This means that the average electricity bill for a family with no children is $25. The y-intercept is 50. This means that for every 1 additional child, she can expect the electricity bill to go up by $50

• The slope is 50. This means that for every 1 additional child, she can expect the electricity bill to increase an average of $50. The y-intercept is 25. This means that the average electricity bill of a family with no children is $25.

• The slope is 25. This means that for every 1 additional family member, she can expect an average of $25 to be added to the electricity bill. The y-intercept is 50. This means that the average electricity bill of a family with no children $50.

• The slope is 50. This means that the average electricity bill of a family with no children is $50. The y-intercept is 25. This means that for every 1 additional child, she can expect the electricity bill to go up by $25.

Tags

CCSS.HSF.LE.B.5