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A data item x = 7.2 is part of a set of data normally distributed with = 8.1 and = 3. a) Calculate the z-score,

A data item x = 7.2 is part of a set of data normally distributed with = 8.1 and = 3.

a) Calculate the z-score, to one decimal place.

b) What percentage of data is x = 7.2 greater than or equal to?

c) Draw a diagram showing the percentage of data greater than or equal to x = 7.2.

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