Normal Distribution Practice

The mean life of a tire is 30,000 km. The standard deviation is 2000 km.

Then, 68% of all tires will have a life between ___________ km and __________ km.

•  28,000 km and 32,000 km.
• 24,000 km and 34,000 km.
• 26,000 km and 34,000 km.
• 27,000 km and 31,000 km.

Tags

CCSS.HSS.ID.A.4

What shape is a normal distribution curve?

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

Tags

CCSS.HSS.ID.A.3

The shelf life for yogurt is normally distributed with a mean of 12 days and a standard deviation of 3 days.

About what percent of yogurts last between 12 and 15 days?

• 68%

• 34%

• 16%

• 2.5%

Patrick and Chris both took a test (mean = 80, std. dev. = 8). Pat scores a 76 and Chris scored a 94. What percent of individuals would score between Pat and Chris on the test?

• 26.8%

• 96%

• 65.1%

• 4%

The percentile represents the....

• percent of data values that are below.
• percent of data values that are above.
• number of data values that are below.
• number of data values that are below.

Find the area of the shaded region. 

• 0.16
• 0.84
• 0.68
• 0.34

Tags

CCSS.HSG.GMD.A.1

CCSS.HSG.MG.A.1

Find the area of the shaded region. 

• 0.16
• 0.84
• 0.68
• 0.34

Tags

CCSS.HSS.ID.A.4

Find the area of the shaded region. 

• 0.16
• 0.84
• 0.68
• 0.34

Tags

CCSS.HSS.ID.A.4

The mean GPA of students in a course at Kansas State is 3.2 with a standard deviation of 0.3. What percent of students in the course have a GPA between 2.9 and 3.8?

• 81.5%

• 47.5%

• 68%

• 95%

Between what two standard deviations of a normal distribution contain 68% of the data?

• one below and one above

• two below and two above

• two below and zero above

• three below and three above