Answer:
Option B) 0.0013
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 1000 hours
Standard Deviation, σ = 50 hours
We are given that the distribution of life of bulb is a bell shaped distribution that is a normal distribution.
Formula:
P(bulb would last longer than 1150 hours)
Calculation the value from standard normal z table, we have,
0.0013 is the probability that a randomly selected bulb would last longer than 1150 hours.
Thus, the correct answer is
Option B) 0.0013
Answer:
5,090,039
Step-by-step explanation:
Are you trying to number it out?
Answer:
3 because it is............
Answer:
Upper P95 = 16.21in
Step-by-step explanation:
When the distribution is normal, we use the z-score formula.
In a set with mean 
and standard deviation 
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question, we have that:
Upper P 95
This is the 95th percentile, which is X when Z has a pvalue of 0.95. So X when Z = 1.645.
Then
Upper P95 = 16.21in
Well, we can set up these equations like this-
Deborah- 2+3w
Kai- 12+2w
w=number of weeks that pass
Now, we set them equal to each other:
2+3w=12+2w
Solve for w
2-12=2w-3w
-10 = -1w
w = 10
10 weeks. Hope this helped!
