Answer:
99.38%
Step-by-step explanation:
We have that the mean (m) is equal to 124, the standard deviation (sd) 6.4 and the sample size (n) = 64
They ask us for P (x <126)
For this, the first thing is to calculate z, which is given by the following equation:
z = (x - m) / (sd / (n ^ 1/2))
We have all these values, replacing we have:
z = (126 - 124) / (6.4 / (64 ^ 1/2))
z = 2.5
With the normal distribution table (attached), we have that at that value, the probability is:
P (z <2.5) = 0.9938
The probability is 99.38%
Note that we can also write equations for circles<span>, </span>ellipses, and hyperbolas<span> in terms of cos and sin, and other </span>trigonometric functions<span>; there are examples of these ...</span>
Answer: The correct answer is "No, because there is a lot of variability in the language arts book data."
The mean of the language arts book is higher than the mean of the social studies book, however, there is a lot of variability in the language arts book. This means that the language arts book could actually be lower than the social studies book. It is not likely but it could happen.
Answer:
1st and 3rd
Step-by-step explanation:
u welcome :)
Answer:
Cost of Amy's Phone= $191.75
Cost of Jill's phone = $191.75*2= $383.5
Step-by-step explanation:
let Amy's phone cost be A
Jill's phone cost = 2A
A/Q-
A +2A = $575.25
3A= $575.25
A=$575.25/3
A= $191.75
then,
Cost of Amy's Phone= $191.75
Cost of Jill's phone= $191.75*2= $383.5
