A store manager is looking at past jewelry sales to determine what sizes of rings to keep in stock. The list shows the ring size

Question

3 years ago

13

A store manager is looking at past jewelry sales to determine what sizes of rings to keep in stock. The list shows the ring size

s purchased by the last ten jewelry customers. 9, 7, 6.5, 7.5, 7, 8, 5, 6, 7.5, 8 What is the variance of the data? Round to the nearest hundredths.
0.40
0.72
1.28
2.14

Mathematics

1 answer:

saw5 [17] · Answer 1 · 2022-08-08T11:32:03+03:00

saw5 [17]3 years ago

5 0

<span>mean: ( 9 + 7 + 6.5 + 7.5 + 7 + 8 + 5 + 6 + 7.5 + 8 ) : 10 = 7.15Variance:(Sigma)² = ( 1.85² + 0.15² + 0.65² + 0.35² + 0.15² + 0.85² + 2.15² + 1.15² + 0.35² + 0.85² ) : 10 ≈ 1.15Answer: C ) 1.15</span>