Question

Students at Valley Middle School are selling raffle tickets to raise money for a local charity. Miss Wilson recorded the numbers of raffle tickets that were sold by her students. The data is shown in the stem and leaf plot.

Answer 1

we know that

The tickets sold were

0 -------> 7 9 9 9 -------> 34 tickets -----> 4 students

1 -------> 12 14 14 16 17 18 -----> 91 tickets -----> 6 students

2 -----> 24 25 25 25 25 26 -----> 150 tickets -----> 6 students

3 ----> 33 34 38 39 -----> 144 tickets -----> 4 students

4 ----> 40 40 41 44 47 ----> 212 tickets -----> 5 students

5 ----> 52 53 -----> 105 tickets -----> 2 students

6 -----> 0 tickets

7 -----> 0 tickets

8 ----> 85 tickets -----> 1 student

Total tickets=34+91+150+144+212+105+85=821

Total students=4+6+6+4+5+2+1=28

Total tickets=821 tickets

therefore

Part 1

In Miss Wilson's class there are 28 students

Part 2

Find out the range

Minimum=7

Maximum=85

Range=85-7

Range=78

Part 3

Find out the mean

Mean=821/28=29.32 tickets

Part 4

Find out the median

Remember that the median is the center of the data set

so

we have 28 numbers in the data set

position 14=25

position 15=25

Median=(25+25)/2=25

Median =25 tickets

Part 5

Find out the mode

Mode=25 tickets

Part 6

Maximum=85 tickets