The z-value that corresponds to a two-tailed 95% confidence interval is z = +/- 1.96. Then the bounds of the confidence interval can be determined as:
Lower bound = mean - z*SD/sqrt(n) = 20 - 1.96*2/sqrt(100) = 20 - 0.12 = 19.88 hours
Upper bound = mean + z*SD/sqrt(n) = 20 + 1.96*2/sqrt(100) = 20 + 0.12 = 20.12 hours
So the first choice is the correct answer: 19.88-20.12 hours
The <span>tree diagram associated with the experiment of selecting two batteries from among four, the defective answer is <span>third one.
</span>Attached with answer is the tree diagram that shows the batteries.
</span>As shown in the image, ofall twelve
possible outcomes, we can see that event N1 contains 9 of these outcomes, and N1N2
contains 6. Thus, because the 12 outcomes are equally likely to be 2/3
To find the volume of the cylinder
V = pi* r^2* h
Plug in what you are given
V = pi* (6)^2* (20)
V = pi * 36 * 20
V = 720 pi
Hope this helps :)
Answer: 26 dollars
Step-by-step explanation:
The owner needs to consider that:
To measure the risk she can multiply the probability of an event to happen (P)* the impact (I) (in this case the impact is the cost).
All these eventes can be considered as independent between each other (no correlation), so you can add their P*I.
In this case:
P1*I1= 1%*550=5.5
P2*I2=6%*150=9
P3*I3=15%*100=15
So, the expected value of what she may spend for repairng is = P1*I1+P2*I2+P3*I3= 5.5+9+15= 29.5
She shoould not spend more than 29.5 dollars, otherwise, she will spend more in the surge supresor than in expected reapring value