The manager of a retail store counted the number of sales each hour during a 60-hour week. The frequency distribution is given below . Find the average number of sales during an hour
Number of sales during hour
Number of occurrences
6 25
7 20
8 10
9 0
10 5
Number of sales during hour
6
7
8
9
10
Number of occurrences
25
20
10
0
5
total sales:
6*25+7*20+8*10+9*0+10*5 = 420
That's 420sales/60hr = 7 sales/hr
I figured it out!!! Thanks. It's 7.
To find the average number of sales during an hour, you need to calculate the total number of sales and divide it by the total number of occurrences.
First, let's calculate the total number of sales:
Number of sales during hour 6: 6 * 25 = 150
Number of sales during hour 7: 7 * 20 = 140
Number of sales during hour 8: 8 * 10 = 80
Number of sales during hour 9: 9 * 0 = 0
Number of sales during hour 10: 10 * 5 = 50
Total number of sales: 150 + 140 + 80 + 0 + 50 = 420
Next, let's calculate the total number of occurrences:
25 + 20 + 10 + 0 + 5 = 60
Now, divide the total number of sales (420) by the total number of occurrences (60):
Average number of sales during an hour = 420 / 60 = 7
Therefore, the average number of sales during an hour is 7.