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SVEN [57.7K]
3 years ago
14

The average starting salary for this year's graduates at a large Texan university is $45,000, with a standard deviation of $4,00

0. Furthermore, it is known that the starting salaries re normally distributed. What is the probability that a randomly selected graduate will have a starting salary of $50,000? Please determine the Z value.
Business
1 answer:
4vir4ik [10]3 years ago
7 0

Answer:

The probability that a randomly selected graduate will have a starting salary of $50,000 or more is 10.56%

Explanation:

The formula for calculating a z-score is:

Z=\frac{x-μ}{σ}

Where:

x=Score in this case is $50,000

μ=Mean or average of the salary: $45,000

σ= standard deviation of $4,000.

Z=\frac{50000-45000}{4000}

Z= 1.25

This value has an associated probability of 0.8944= 89.44%, this means 89.44% of graduates will have a starting salary of $50,000 or less.

But if we want to know the probability that the graduate has a salary of $50,000 or more, taking into account a population of 100%=1

1-0.8944= 0.1056

Which represents that 10.56% of population of graduates will earn $50,000 or  more.

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