Binomial distributions

The right notation for p and q if X represents the number of pupils who use school buses:

• p = 55, q = 45

• p = 0.45 , q = 0.55

• p = 45, q = 55

• p = 0.55, q = 0.45

Tags

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.4

The right notation to find the probability that less than 2 people use school buses:

• 1 - P( X < 2)

• $P\left(X\le2\right)$
  

• 1- P ( X > 2)

• P(x = 0) + P( x =1)

Find the probability that more than 3 pupils come to school by school buses 

• 0.2415

• 0.2005

• 0.0401

Tags

CCSS.HSS.MD.B.6

CCSS.HSS.MD.B.7

Determine the value of n.

• 0.4

• 1/4

• 1/8

• 1/2

Tags

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.4

 $X\sim B\left(120\ ,\ 0.4\right)$  

What is the mean for the above discrete random variable? 

• 120

• 0.4

• 120 x 0.4 x 0.6

• 120 x 0.4 

Tags

CCSS.HSS.MD.A.2

 $X\sim B\left(120\ ,\ 0.4\right)$  

What is the variance for the above discrete random variable? 

• 120

• 0.4

• 120 x 0.4 x 0.6

• 120 x 0.4