QUIZ 2 (Normal Distribution)

What's the probability x < 13?

(Mean = 10, Variance = 4)

• 77.34%

• 22.66%

• 27.34%

• 06.68%

Tags

CCSS.HSS.ID.A.4

What's the probability x > 17?

(Mean = 15, Standard dev = 3)

• 74.86%

• 75.14%

• 25.14%

• 25.46%

Tags

CCSS.HSS.ID.A.4

The 40 yards sprint times for a soccer team are found to be normally distributed with a mean of 5.2 seconds and a standard deviation of 0.3 seconds.  What is the z-score for a player who runs a time of 5.6 seconds?

• -1.33
• 1.33
• 0.88
• 1.02

Tags

CCSS.HSS.ID.A.4

The heights of male students are Normally distributed with mean 1.7 m and standard deviation 0.2 m

In a population of 400 male students, how many would you expect to have a height between 1.4 m and 1.6 m?

• 24.17%

• 96

• 97

• 62.47%

Tags

CCSS.HSS.ID.A.4

What is the the total area under the standard normal distribution curve?

• 100
• 25
• .5
• 1

Tags

CCSS.7.SP.C.7A

μ = 70 , σ = 8 , X = 50 . Find z score

• 2.5
• -2.5
• 5.2
• -5.2

Tags

CCSS.HSS.ID.A.4

Which is NOT true about the standard normal distribution?

• It is bell-shaped.
• It is unimodal.
• The mean is 0 and the standard deviation is 1.
• It is asymmetrical.

Tags

CCSS.HSS.ID.A.4

Find the area under the normal distribution curve to the left of 
Z=0.27.

• 0.3936
• 0.3897
• 0.6064
• 0.4892

Tags

CCSS.HSS.ID.A.4

Find the area under the normal distribution curve between a z=-1.26 and z=.57. 

• 0.0047
• 0.9204
• 0.6119
• 0.4981

Tags

CCSS.HSS.ID.A.4

Find the area of the shaded region if the z-score is 1.25

• 0.1056
• 0.8944
• 0.8849
• 0.1151

Tags

CCSS.HSS.ID.A.4