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101EXPERIENCE
07.03.2020 •
Mathematics
Assume that the random variable X is normally distributed, with mean mu equals 80μ=80 and standard deviation sigma equals 20.σ=20. Compute the probability P(Xgreater than>9696).
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Ответ:
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:
Compute the probability P(Xgreater than>96).
This is 1 subtracted by the pvalue of Z when X = 96. So
Ответ:
sould by num one hop help
Step-by-step explanation: