Researchers want to determine if there is a relationship between whether or not a woman smoked during pregnancy and her baby's birth weight. Researchers examined pregnancy records for the past five years at a large hospital.

What type of study is described?

• Survey

• Experimental Study

• Observational Study

A researcher is interested in studying the eating habits of high school students at the three schools in their district. Which sample would give the least biased results?

• Students from one school with healthy food options.

• Students from one school with unhealthy food options.

• An equal number of students from each of the three schools.

• Only students from one school with high percentage of athletes.

What is the standard deviation for the data given:

5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 6.89

• 10.1

• 7.26

• 9

Find the range of the numbers below.

7, 18, 5, 13, 8, 12, 6

• 1

• 7

• 13

• 18

Tags

CCSS.4.MD.B.4

The median of the numbers 35, 32, 10, 66, and 45 is...

• 35

• 32

• 10

• 45

Tags

CCSS.6.SP.B.5C

What is the mode of the following data set...

4 , 8 , 5 , 17 , 5 , 4 , 9 , 6 , 4, 82

• 4

• 9

• 6

• 5

Tags

CCSS.6.SP.B.5C

During Lebron's last 6 years of playing basketball, these were his average scores for points per game:

29.8, 29.1, 28.7, 22.9, 20.0, 22.3

Find the mean points per game for those 6 years.

• 32.9

• 25.47

• 28.7

• 22.32

Tags

CCSS.6.SP.B.5C

This data is normally distributed. What percent of the data is in the shaded region?

• 68%

• 32%

• 16%

• 50%

Tags

CCSS.HSS.ID.A.4

Which interval shows 95% of the data given a mean of 15 and a standard deviation of 3? 

• 9 to 21
• 12 to 18
• 6 to 24
• 13 to 16

Tags

CCSS.HSS.ID.A.4

Find the Z-score.

Mean = 21

Standard Deviation: 1.3

x = 22

• 0.77

• 5.33

• 1.07

• 1.26