Exam 2

Question 1

p(x=a)

Answer 1

binompdf(n,p,a)

Question 2

p(x≤a)

Answer 2

binomcdf(n,p,a)

Question 3

p(x<a)

Answer 3

binomcdf(n,p,a-1)

Question 4

p(x>a)

Answer 4

1-binomcdf(n,p,a)

Question 5

p(x≥a)

Answer 5

1-binomcdf(n,p,a-1)

Question 6

mean for binomials

Answer 6

n x p

Question 7

standard deviation for binomials

Answer 7

square root n x p x q

Question 8

uniform distribution

Answer 8

number in between a & b x 1/b-a

Question 9

p(a<x<b)

Answer 9

normalcdf(a,b,mean,standard deviation)

Question 10

invnorm formula

Answer 10

b=invnorm(percentage, mean, standard deviation)

Question 11

p(x<b) or p(x>b) (small tail)

Answer 11

0.5-normalcdf(a,b,mean,standard deviation)

Question 12

p(x<b) or p(x>b) (big tail)

Answer 12

0.5+normalcdf(a,b,mean,standard deviation)

Question 13

p(x<b>c) (two small tails)</b>

Answer 13

1-normalcdf(a,b,mean,standard deviation)

Question 14

z scores

Answer 14

mean=0, standard deviation=1

Question 15

How do you determine a probability distribution

Answer 15

1. Sum of all probablities is 1
2. Every probablity is between 0 and 1

Question 16

mean of probability distribution

Answer 16

put x and p(x) in calculator and use var-stats

Question 17

average probability

Answer 17

normalcdf(a,b,mean,standard deviation/square root of average)