a car reduced its speed in a ratio of 2 to 3 if the final speed was 90 km per hour then what was the original speed.
1 answer:
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Answer:
Brand 1 Brand 2 Difference
37734 35202 2532
45299 41635 3664
36240 35500 740
32100 31950 150
37210 38015 −805
48360 47800 560
38200 37810 390
33500 33215 285
Sum of difference = 2532+ 3664+740+150 −805+ 560 +390 +285 = 7516
Mean =
Mean =
a) d= 939.5
=1441.21
b)SD= 1441.21
c)Calculate a 99% two-sided confidence interval on the difference in mean life.
confidence level =99%
significance level =α= 0.01
Degree of freedom = n-1 = 8-1 =7
So,
Formula for confidence interval
Substitute the values
confidence interval
confidence interval to
Confidence interval to
Answer:
<h2>NONE OF THEM</h2>Step-by-step explanation:
From the graph,
y and x intercepts are and approximately
respectively
for A, C and D :
x intercept the value of y=0, and y intercept x=0.
x and y intercepts are and approximately
respectively
for B:
x and y intercepts are and approximately
respectively
Therefore x and y intercepts for the lines and
they are not equal to the x and y intercepts of the given graph