Answer:
a) 0.6915; b) 2.83 years
Step-by-step explanation:
For part a,
The formula for a z score is
Our mean, μ, is 3.25 and our standard deviation, σ, is 0.5.
This gives us
z = (3-3.25)/0.5 = -0.25/0.5 = -0.5
Using a z table, we see that the area under the curve to the left of this is 0.3085. However we want the area to the right; this means we subtract from 1:
1-0.3085 = 0.6915
For part b,
We look in the cells of a z table to find the value closest to 20%, or 0.2000. This is 0.2005, which corresponds with a z score of -0.84:
-0.84 = (X-3.25)/0.5
Multiply both sides by 0.5:
0.5(-0.84) = ((X-3.25)/0.5)(0.5)
-0.42 = X-3.25
Add 3.25 to each side:
-0.42+3.25 = X-3.25+3.25
X = 2.83
The advertised life would be 2.83 years.
Answer:
So in your example, the odds are 7:3. In English, that means that if we had a horse race and we held 10 races with the same horses, our favored horse would finish first 7 times and lose the remaining three. But treated as a probability? If we look at it that way, we have 10 possible outcomes and the event of interest (the horse winning) happens 70% of the time. Conversely, the probability of the event not happening (the horse losing) is 30%.
Step-by-step explanation:
Answer:84.5%
Step-by-step explanation:Subtract 85.79 from 10.5 that will give you 84.5.
Answer:
Step-by-step explanation:
Slope = (change in y)/ (change in x)
= (13 - 3)/(1 - (-1))
= (13 - 3)/(1 + 1)
= 10/2
= 5
Sry I really don’t know I would help but it got me confused
