Algebra Section 9 Quiz Retake

What's the median test score?

• 2

• 1.5

• 91

• 92

The amount of items that each student sold for the class fundraiser was recorded. What percent of students sold at most 44 items?

• 30%

• 35%

• 50%

• 65%

For the data set shown, what's the IQR?

{15, 20, 9, 8, 10, 25, 17}

• 8

• 5

• 11

• 17

• 9.5

If 2nd period had 28 students how many got an 80 or less?

• 10

• 7

• 25

• 15

Identify the best measure of center for this data and the reason.

• Standard deviation because it's a normal distribution

• IQR because it's a normal distribution

• IQR because it's skewed

• Median because it's skewed

• Mean because it's a normal distribution

If 2nd period has 28 students and 1st period has 20 students, how many students (in total) scored 80 or better?

• 31

• 20

• 35

• 33

At a local high school, GPA's are normally distributed with a mean of 2.9 and standard deviation of 0.5. What% of the students have a GPA between 2.4 and 3.4?

• 50

• 68

• 52

• 99.7

• 95

Which interval shows 95% of the data given a mean of 21 and a standard deviation of 2?

• 17 to 25

• 19 to 21

• 15 to 27

• 17 to 21

• 21 to 23

What % of the data exists between 15 and 18 given that the mean = 15 and a standard deviation = 3?

• 34%

• 20%

• 80%

• 95%