Answer:
The bulbs should be replaced each 1060.5 days.
Step-by-step explanation:
Problems of normally distributed samples are solved using 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 problem, we have that:
How often should the bulbs be replaced so that no more than 1% burn out between replacement periods?
This is the first percentile, that is, the value of X when Z has a pvalue of 0.01. So X when Z = -2.325.
The bulbs should be replaced each 1060.5 days.
The person on top might be a scam seen the same url too many times. J
Answer:
I think it is d either that or b, but im more positive its d
Step-by-step explanation:
Answer:
<em>Mark used 6.43 megabytes of data.</em>
Step-by-step explanation:
The given equation is: , where is amount of data used in megabyte.
For finding the amount of data Mark used, <u>we need to solve the above equation for </u>.
First subtracting 5.25 from both sides, we will get.....
Now, dividing both sides by 0.3 ...........
<em>(Rounded to the nearest hundredth)</em>
Thus, Mark used 6.43 megabytes of data.