2³+b²+3²=?hihihihihihihi
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Answer:
X = 101.48
Step-by-step explanation:
Normal Probability Distribution
Problems of normal distributions can be solved using the z-score formula.
In a set with mean and standard deviation
, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.
Average of 62 seconds with a standard deviation of 24.5 seconds.
This means that
If the manager wants to advertize that 95% of the time, they serve customers within X seconds, what is the value of X?
This is the 95th percentile of times, which is X when Z has a p-value of 0.95, so X when Z = 1.645.