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The mean of a set of data is 4.78 and its standard deviation is 2.23. Find the z score of a value of 9.11.

(a) 2.24

(b) 2.14

(c) 1.94

(d) 1.75

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Priyanshu Patel
Priyanshu PatelLv10
2 Apr 2021
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