For each given standard deviation, enter the letter of the corresponding data set.

= 0

= 0.7071

= 2.278

= 11.18

= 26.926

Circles A, B, C, D, and E each contain 4 numbers. Circle A contains 20, 20, 20, 20. Circle B contains 10, 20, 30, 40. Circle C contains 18, 19, 19, 20. Circle D contains 18, 19, 20, 24. Circle E contains 10, 20, 30, 80.

A=0, C=0.7071, D=2.278,B=11.18, E=26.926

Step-by-step explanation:

1. perpendicular

2. parallel

3. perpendicular

1. sometimes

2.   never

3   .08c = 7.50+.05c   250 pages

step-by-step explanation:

1.   sometimes

the theoretical probability of rolling a 1 is 1/6.   perhaps you got really lucky and never rolled a 1   in those 60 times.   your experimental probability is 0.   or perhaps you rolled a 1   20 times.   your experimental probability is 20/60 is 1/3.     it really just depends on how you rolled in that experiment.

2.   never

the probability of the event occurring is 1.   that is being 100 % sure it will happen.   that is the maximum amount of confidence we have.

3.   no customer card cost:   .08 times number of pages

customer card cost:   7.50 + .05 times number of pages

we want to find when it costs the same amount, so we will set these equal

let c = number of pages

.08c = 7.50+.05c

subtract .05c from each side

.08c-.05c = 7.5+.05c-.05c

.03c=7.5

divide each side by .03

.03c/.03 = 7.5/03

c =250  

the cost is the same at 250 pages