Intro to z-scores

Given the data set: 1, 2, 3, 6, 9, 11, 45, 102, calculate the percentile for the data value 11 in this set.

• 70^th percentile

• 62.5^th percentile

• 72.5^th percentile

• 75^th percentile

Tags

CCSS.6.SP.B.5C

What is the percentile of the value 74 in the following group of 15 data values? 23, 30, 35, 55, 61, 65, 68, 69, 70, 74, 80, 85, 90, 100, 100

• 73rd

• 67th

• 75th

• 60th

Which of these could be a cumulative frequency graph?

• 
• 

What percent of the college students surveyed have less than $5000 in debt?

• 25%

• 50%

• 70%

• 100%

What is the 75th percentile?

• 50

• 40

• 30

• 60

Tags

CCSS.6.SP.B.5C

Find the Z-score.

Mean = 22

Standard Deviation: 3.1

x = 29

• 2.26

• 16.45

• -2.26

• 1.26

For Mrs. V: mean = 55 and standard deviation = 19

For Mr. T: mean = 33 and standard deviation = 10.5

Mary Beth is very proud of the score of 80 that she earned in Mrs. V's class. Albert is equally proud of the score of 42 he earned in Mr. T's class. Who has the better score?

• Mary Beth

• Albert

Tags

CCSS.HSS.ID.A.4

What is the formula to find the z-score for population?

• $z=x-\mu$

• $z=\frac{\sigma-\mu}{x}$

• $z=\frac{\sigma}{\sqrt{n}}$

• $z=\frac{x-\mu}{\sigma}$

Crispix has 3g of sugar. What is the z-score? (mean = 7.6, SD = 4.5)

• +1.02

• -1.02

• -0.76

• +0.76

Tags

CCSS.HSS.ID.A.4

The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees.  What is the z-score for a temperature of 17 degrees?  

• 1 
• 1.43
• -1.43
• 11.5

Tags

CCSS.HSS.ID.A.4