Normal Model Review

If I tell you that you scored at the 55th percentile on your final exam, you would know:

• 55% of the class scored the same or worse than you did

• You earned a 55% on the exam

• You failed the exam

• 45% of the class scored worse than you did

Tags

CCSS.7.EE.B.3

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

• 70^th percentile

• 62.5^th percentile

• 72.5^th percentile

• 75^th percentile

The z-score represents.....

• the amount of standard deviations a data value is above or below the mean.
• the percentile the data value is above or below the mean.
• the amount of standard deviations a data value is above or below the median.
• the percent the data value is above or below the mean.

Tags

CCSS.HSS.ID.A.4

Adam's Z-score on a test is -0.5, What does this mean?

• Adam scored 0.5 fewer points than the mean score.

• Adam scored at the bottom 0.5%.

• Adam scored 0.5 standard deviations below the average.

• Adam earned 0.5 extra credit points.

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

• $z=x-\mu$

• $z=\frac{\sigma-\mu}{x}$

• $z=\frac{\sigma}{\sqrt{n}}$

• $z=\frac{x-\mu}{\sigma}$

Tags

CCSS.HSS.ID.A.4

 Assume the test scores follow the model mean=82, standard deviation=5. What score would equate to z = 1.6?

• 90
• 83.6
• 87.6
• 74

If Tina's Z-score is +1.95 and Paula's Z-score is +1.8, who performed better on the test?

• Tina's performance is farther above the mean so she did better.

• Paula's score is closer to the mean so she did better.

• They both did the same.

• No clue!

What shape is a normal distribution curve?

• Half curve
• Round curve
• Bell curve
• Square curve

Tags

CCSS.HSS.ID.A.3

Which of the following histograms would be best approximated by a normal distribution?

• 
• 
• 
• 

What does this symbol represent?

• Mean
• Median
• Mode 
• Standard Deviation