Answer: 57
=====================================================
Explanation:
Convert each raw score to a z score
If x = 63.4, then
z = (x-mu)/sigma
z = (63.4-72.3)/8.9
z = -1
if x = 81.2, then
z = (x-mu)/sigma
z = (81.2-72.3)/8.9
z = 1
So P(63.4 < x < 81.2) is the same as P(-1 < z < 1)
Through the empirical rule (aka the 68-95-99.7 rule), we know that roughly 68% of the data values are within one standard deviation of the mean. In other words
P(-1 < z < 1) = 0.68 approximately (see note below)
Multiply 0.68 by the total 84 to get
0.68*84 = 57.12
which rounds to 57 people
Note: we can use a calculator to get a more accurate result of 0.68268949; a data table works as well but it won't be as accurate. For the purposes of this problem, the value 0.68 is good enough
Answer:
The value of r is 16
Step-by-step explanation:
<u><em>The correct question is</em></u>
Find out the value of r if the slope between the two ordered pairs is m=-1/5
we know that
The formula to calculate the slope between two points is equal to
we have the points
(r, 7), (11, 8)
substitute the values
Remember that
equate the equations
solve for r
Multiply in cross
Answer:
3/4 cups
Step-by-step explanation:
First convert 1 1/4 to an improper fraction which would give you 5/4. Next, you have to manipulate 5/4 and 1/2 so they have the same denominator, so you are able to subtract. So 1/2 = 2/4. Next subtract the two to get the remaining amount of flour. 5/4 - 2/4 = 3/4 cups.
Thank you so much! merry christmas.
Answer:
8 spaces
Step-by-step explanation:
8 spaces to the left of the x axis
