Normal Distribution

What is P(x > 27)?

• 97.5%

• 84%

• 13.5%

• 2.5%

Tags

CCSS.HSS.ID.A.4

What is P(33 < x < 51)?

• 84%

• 68%

• 81.5%

• 18.5%

Tags

CCSS.HSS.ID.A.4

What is P(x < 35)

• 47.5%

• 13.5%

• 84%

• 16%

Tags

CCSS.HSS.ID.A.4

What is P(68 < x < 84)?

• 47.5%

• 83.85%

• 84%

• 87.5%

Tags

CCSS.HSS.ID.A.4

What is P( x < 88)?

• 13.5%

• 2.5%

• 97.5%

• 95%

Tags

CCSS.HSS.ID.A.4

A statistical study calculated that the average cost of used iPhones is $230, with a standard deviation of $25. What is the probability that a select phone from the sample costs between $205 and $280?

• 81.5%

• 68%

• 95%

• 47.5%

Tags

CCSS.HSS.ID.A.4

A statistical study calculated that the average usage of smartphones during class is 22 minutes a day, with a standard deviation of 5 minutes. What is the percentage of the people from the study that uses their smartphones less than 27 minutes a day?

• 34%

• 16%

• 84%

• 95%

Tags

CCSS.HSS.ID.A.4

A statistical study calculated that the average score on the SAT Exam is 1270, with a standard deviation of 130. What percentage of examinees from the study scored between 1270 and 1530?

• 84%

• 68%

• 97.5%

• 47.5%

Tags

CCSS.HSS.ID.A.4

A statistical study calculated that the average time teenagers spend playing app games each day is 3.4 hours, with a standard deviation of 0.7 hours. What is the percentage of teenagers in the study that spends less than 2.7 hours each day on app games?

• 68%

• 16%

• 84%

• 13.5%

Tags

CCSS.HSS.ID.A.4

A statistical study calculated that the average speed of bus drivers is 38 mph, with standard deviation of 4 mph. What percentage of bus drivers in the study drive an average speed greater than 46 mph?

• 97.5%

• 84%

• 16%

• 2.5%

Tags

CCSS.HSS.ID.A.4