Question

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 4. On a particular day, 52 mobile phones were sold. What is the z-score of the sale of mobile phones on that day? -28 1.75 28 -1.75

Answer 1

The z-score for the sale of 52 mobile phones, given a mean of 45 sales and a standard deviation of 4, is 1.75.

Step-by-step explanation:

The z-score is used to determine how many standard deviations a given value is from the mean. To calculate the z-score for the sale of 52 mobile phones, you subtract the mean sales from the sales value and then divide by the standard deviation. So, the z-score for 52 phones would be calculated as (52 - 45) / 4, giving us a z-score of 1.75.