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Sagot :
Answer:
Norma should be offered the job.
Step-by-step explanation:
For Norma;
Population mean; μ = 67.5
Sample mean; x¯ = 84.5
standard deviation; σ = 10
Formula for the test statistic is;
z = (x¯ - μ)/σ
z = (84.5 - 67.5)/10
z = 1.7
For Rebecca;
Population mean; μ = 293
Sample mean; x¯ = 306.5
standard deviation; σ = 27
Formula for the test statistic is;
z = (x¯ - μ)/σ
z = (306.5 - 293)/27
z = 0.5
For Morgan;
Population mean; μ = 7.1
Sample mean; x¯ = 8.38
standard deviation; σ = 0.8
Formula for the test statistic is;
z = (x¯ - μ)/σ
z = (8.38 - 7.1)/0.8
z = 1.6
The person with highest z-score is Norma and as such he should get the job.
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