Usually scatterplots have a single line (called<span> a regression line) running through them. is that what you need?</span>
Let's assume two variables x and y which represent the local and international calls respectively.
x + y = 852 = total number of minutes which were consumed by the company (equation 1)
0.06*x+ 0.15 y =69.84 = total price which was charged for the phone calls (Equation 2)
from equation 1:-
x=852 -y (sub in equation 2)
0.06 (852 - y) + 0.15 y =69.84
51.12 -0.06 y +0.15 y =69.84 (subtracting both sides by 51.12)
0.09 y =18.74
y= 208 minutes = international minutes (sub in 1)
208+x=852 (By subtracting both sides by 208)
x = 852-208 = 644 minutes = local minutes
Assuming that x is equal to weekday shows and y is equal to weekend shows, the band will exceed their goal by $150.
To find this, we need to plug 15 in for x and 6 in for y. Then we need to evaluate the equation.
R = 50x + 150y
R = 50(15) + 150(6)
R = 750 + 900
R = 1650
Therefore, we know that they exceeded their goal by $150 by getting the total of $1650.
ANSWER:
104
STEP-BY-STEP EXPLANATION:
Given:
Standard deviation (σ) = 700
Confidence level = 95%
Mean error (Eμ) = 135
We have for a confidence level of 95%:
Now, we calculate the minimum value of the sample size as follows:
The minimum sample size needed is 104
6m+4 = 8m
8m-6m = 4
2m = 4
m = 2
if you are asking for 4m, then it would be 4(2) = 8
