$1.2 is the sales tax I think. I did 40 x .03
The slope of points (-2,6) and (3,10) is m= 0.8
Answer:
Probably unequal ( B )
Step-by-step explanation:
<u>experimental group = 10</u>
using 85% ethanol gasoline
mean = 240 pounds per 100 miles
standard deviation = 20 pounds
<u>control group = 14 vehicles </u>
using regular gasoline
mean = 252 pounds per 100 miles
standard deviation = 15 pounds
comparing the sample variance of each group shows that they are probably unequal using the equation below
Variance for a sample set of data = ∑ ( x - X ) ^2 / n - 1
where n = number of events
X = mean value
x = value of events
X difference between a and b is 7
y difference between a and b is 5
1:2 = 1/2 multiplying by 2 will be the whole thing or point c
2x7=14
2x5=10
(6+14,3+10)
Ans: (20,13)
