Question

Round each z-score to the nearest hundredth. A data set has a mean of x =...

Round each z-score to the nearest hundredth.

A data set has a mean of x = 4049 and a standard deviation of 103. Find the z-score for each of the following.

(a) x = 3840

(b) x = 4200

(c) x = 4300

(d) x = 4030

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Solution :

Given ,

mean = = 4049

standard deviation = = 103

(A)x=3840

using z-score formula

z =X -/

z=3840-4049/103

z=-2.03

( B)

x=4200

using z-score formula

z =X -/

z=4200-4049/103

z=1.47

(C)

x=4300

using z-score formula

z =X -/

z=4300-4049/103

z=2.44

(D)

x=4030

using z-score formula

z =X -/

z=4030-4049/103

z=-018

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