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melanastormes92
11.01.2020 •
Mathematics
In a set of scores with a mean of 50 and a standard deviation of 5, what raw score is represented be a z-score of 1.00?
a. 30
b. 55
c. 60
d. 20
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Ответ:
B. 55
Step-by-step explanation:
Problems of normally distributed samples can be 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:
What raw score is represented be a z-score of 1.00?
This is X when Z = 1. So:
So the correct answer is:
B. 55
Ответ:
1728(pie)
Step-by-step explanation:
So every thing you did is all correct but i dont know if the person who asked the question if he wants an exact answer like 1728(pie) or have it divided by pie