The Kamp family has twins, Rob and Rachel. Both Rob and Rachel graduated from co

Question

The Kamp family has twins, Rob and Rachel. Both Rob and Rachel graduated from college 2 years ago, and each is now earning $50,000 per year. Rachel works in the retail industry, where the mean salary for executives with less than 5 years’ experience is $35,000 with a standard deviation of $8,000. Rob is an engineer. The mean salary for engineers with less than 5 years’ experience is $60,000 with a standard deviation of $5,000.

Compute the z values for both Rob and Rachel

Compute the z values for both Rob and Rachel

Explanation / Answer

Z score for Rob is as follows:

z=(Xi-Xbar)/sigma, where Xi is Rob's salary and Xbar the mean salary and sigma the standard deviation.

z=(50,000-35000)/8000=1.875 (Ans)

Similarly, usisng the same formula obtain Rachel's z score which is as follows:

z=(50000-60000)/5000=-2 (Ans)

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