These are the means and standard deviations for examples of heights from two kinds of trees.
table:
tree a - (mean: 25ft) (standard deviation: 5ft)
tree b - (mean: 60 ft) (standard deviation: 12 ft)
select the two true statement.
a. tree a's heights are more spread out than tree b's heights.
b. tree a's heights are less spread out than tree b's heights.
c. tree a has a greater average height than tree b.
d. tree a has a lower average height than tree b.

Step-by-step explanation:

Tree A's heights are less spread out than tree B's heights. Tree A has a lower average height than tree Bs

28

step-by-step explanation:

because that's the answer

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