The manager went over the sales of mobile phones at the store and found that the mean sale was 45, with a standard deviation of

Question

3 years ago

8

4. On a particular day, 52 mobile phones were sold. What is the z-score of the sale of mobile phones on that day?

1 answer:

d1i1m1o1n [39] · Answer 1 · 2021-12-14T06:21:38+03:00

The z-score of the sale of mobile phones on that day is 1.75

Step-by-step explanation:

The formula of z-score is z = (x - μ)/σ, where:

∵ The mean sale was 45

∴ μ = 45

∵ The standard deviation was 4

∴ σ = 4

∵ 52 mobile phones were sold on a particular day

∴ x = 52

To find z-score of the sale of mobile phones on that day substitute the values of x, μ, and σ in the formula of z-score

∵ $z=\frac{52-45}{4}$

∴ $z=\frac{7}{4}$

∴ z = 1.75

The z-score of the sale of mobile phones on that day is 1.75

Learn more:

You can learn more about z-score in brainly.com/question/7207785

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