Answer:
Modification has not reduced the number of accidents.
Step-by-step explanation:
A B C D E F G H
Before modification 5 7 6 4 8 9 8 10
After modification 3 7 7 0 4 6 8 2
Difference -2 0 1 -4 -4 -3 0 -8
Mean of differences
Standard deviation of differences =
Formula of paired t test :
Df = n-1 = 8-1 =7
t critical> t calculated
So, We failed to reject null hypothesis
Hence modification has not reduced the number of accidents.
Answer:
i dont know how to answer but il give u a tip on how to identify proportional rates: Ratios are proportional if they represent the same relationship. One way to see if two ratios are proportional is to write them as fractions and then reduce them. If the reduced fractions are the same, your ratios are proportional.
Step-by-step explanation:
Answer:
p=13
hence 13+9=22
Step-by-step explanation:
Answer:
Step-by-step explanation:
C = 100S + 2800
so ur y intercept is : (0,2800)
ur x intercept can be found by subbing in 0 for y (or in this case C) and solving for x (or in this case S)
0 = 100S + 2800
-100S = 2800
S = -2800/100
S = -28
so ur x intercept is (-28,0)
so plot ur intercept points (0,2800) and (-28,0)
and u have a slope of 100....or 100/1
so start at (-28,0).....move up 100 and to the right 1....plot that.....move up 100 and to the right 1.....plot that.....keep following this pattern....ur line will eventually cross the y axis at (0,2800)