Answer:
0.13093
Step-by-step explanation:
Give. That :
Population mean = 40% = 0.4
Sample size (n) = 64
Probability that more than 30 have computer at home
Mean = np = 64 * 0.4 = 25.6
Standard deviation = sqrt(n*p*(1-p)) = 3.919
P(x > 30)
USing the relation to obtain the standardized score (Z) :
Z = (x - m) / s
Z = (30 - 25.6) / 3.919 = 1.1227353
p(Z < 1.122) = 0.13093 ( Z probability calculator)
Answer:
18
Step-by-step explanation:
Probability of getting 3 tails in 3 coin flips is 18
Answer:
Step-by-step explanation:
Z score is the number of standard devations above the mean.
For example if z=1, the data value is 1 st. dev. above the mean.
So, z=1.95, so the player's heigh is 1.95 st. dev. above the mean.
Answer:
lets find how many books are in each box
120/5=24
so 24 book in a box so lets divide for the 216 books
216/24=9
9 boxes
Hope This Helps!!!
Answer:
Quarter of an hour = 25 minutes
800 words in 25 minutes.
800 ÷ 25= 32
