To solve this problem, we can use the z statistic to find
for the probability. The formula for z score is:
z = (x – u) / s
Where,
u = the sample mean = 68
s = standard deviation of the samples = 12
x = sample value = 70
In this case, what is asked is the probability that the
sample mean is larger than 70, therefore this corresponds to the right of z on
the graph of normal distribution.
z = (70 – 68) / 12
z = 2 / 12
z = 0.17
Therefore finding for P at z ≥ 0.17 using the standard
distribution tables:
P (z = 0.17) = 0.5675
But this is not the answer yet since this is the P to the
left of z. Therefore the correct one is:
P (z ≥ 0.17) = 1 - 0.5675
P (z ≥ 0.17) = 0.4325 = 43.25%
<span>The probability that the sample mean is larger than 70 is
43.25%</span>
Answer:
The answer is 100
Step-by-step explanation:
Answer:
where da question at
Step-by-step explanation:
14 and 15 have no common factor except ' 1 ' ,
so the fraction 14/15 can't be simplified.
It's already in the simplest available form ("lowest terms").
This college cost and savings calculator is the ideal tool for your college planning needs. It combines a college cost calculator with a 529 college savings calculator. Obtain a personalized projection of your future college costs by entering your child's age, the type of college you're saving for, and your household income. This calculator shows you how much to save for college in a 529 college savings plan. You can adjust the monthly contribution to see how much monthly contributions can compound over time and the percentage of total college costs your savings will cover.
