Complete the following:
1. A teacher gives a 20-point quiz to 10 students. The scores are listed below. What percentile corresponds to the score of 12?
20 8 10 7 15 16 12 19 14 9
A. 13
B. 40
C. 25
D. 12
2) A data set contains the observations 3, 6, 7, 2, 8. Find Σx 2 -Σx 25 .
A. 129.6
B. 297.2
C. 540.8
D. 26.8
3)Merchants are always interested in determining why a customer selected their store to make a purchase. Best Sportswear Boutique conducted a customer survey to determine why its customers shopped at the store. The results are shown in the figure. What proportion of customers responded that merchandise was the reason they shopped at the store?
A.27
B.37
C. 12
D. 30
