Question

You are given information about the amount of each purchase at a department store. Find the mean, median, mode, range and standard deviation when each purchase decreases by 15%.

Mean: $51.72

Median: $37.25

Mode: $21.36

Range: $415.85

Standard Deviation: $11.91
Please help, thank you!!!

Answer 1

$43.96 ; $31.66 ; $18.17 ; $384.66

Explanation:

15% decrease :

Mean = (1 - 0.15) * 51.72) = $43.96

Median = (1 - 0.15) * 37.25 = $31.66

Mode : (1 - 0.15) * 21.36 = $18.156 = $18.17

Range = value of range will now decrease by 15% / 2 = 7.5% ; (1 - 0.075) * $415.85 = $384.66