Statistics Review- Chapters 1-3

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

• 70

• 62.5

• 72.5

• 75

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

• 55% of the class scored as good or worse than I did 
• I earned a 55% on the exam
• I failed the exam
• 45% of the class scored worse than I did 

Tags

CCSS.6.SP.A.2

CCSS.6.SP.B.5

Anna and her brother are both 62 inches tall. Anna is in the 85th percentile for height for her age and her little brother is in the 90th percentile. Who is taller for their age?

• They're the same, both 62 inches.
• Anna, she's taller than more people. 
• Brother, he's taller than more people. 
• You can't tell if you don't know the mean and standard deviation. 

Tags

CCSS.6.SP.A.2

CCSS.6.SP.B.5

Tests in Mr. Jones class have a mean score of 73 and standard deviation of 6 points. Mark scored a 68 on the test. What is his z-score?

• 0.83
• 5
• -0.83
• -5

Tags

CCSS.HSS.ID.A.4

Which colored curve has the lowest standard deviation?

• Orange
• Red
• Blue
• Green

Tags

CCSS.HSS.ID.A.2

CCSS.HSS.ID.A.3

Parvati's potions quiz grade had a z-score of 1.8, Lavender's score on her divination quiz had a z-score of 0.7. Who did better?

• Parvati, she was 1.8 points above the mean and Lavender was only above by 0.7 points. 
• Parvati, she was 1.8 standard deviations above the mean and Lavender was only above by 0.7 standard deviations. 
• You can't tell if you don't know which class Hermione is in. 
• You can't tell if the scores were on different quizzes. 

Tags

CCSS.HSS.ID.A.2

What does a z-score of 2.15 mean?

• The score is 2.15 units above the mean. 
• The score is 2.15 standard deviations above the mean.
• The score is 2.15 units below the mean. 
• The score is 2.15 standard deviations below the mean. 

What does a z-score of 0 mean?

• The score is equal to the mean.
• The score is 0 points. 
• There is no data.
• You can't tell unless you know the data is normal. 

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

consist of n individuals from the population chosen in such a way that every individual has an equal chance of being selected

• convenience sample
• cluster sample
• simple random sample
• stratified random sample

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

method used so that units do not know which treatment they are getting

• blinding
• replication
• treatment
• hypothesis

Tags

CCSS.HSS.IC.B.3