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Probability and Statistics Worksheet 1

Answer Key

1

The results of a class test of six students were 91, 99, 87, 83, 77, 83. Find the following:

 

a.    Mean: 86.67

 

b.    Median: 85

 

c.    Mode: 83

2

The rates of five vegetables in the market were $35, $30, $40, $38, $40. Find the following:

 

a.    Mean: $36.6

 

b.    Median: $38

 

c.    Mode: $40

3

The amount of rainfall recorded in a town in mm in a year was 60, 70, 65, 73, 77, 53, 68, 76, 62, 50, 53, 53. Find the following:

 

a.    Mean: 63.33

 

b.    Median: 63.5

 

c.    Mode: 53

4

The costs of 5 pens in the market are $3.4, $5.1, $ 3.4, $2.4, $4. Find the following:

 

a.    Mean: $3.66

 

b.    Median: $3.4

 

c.    Mode: $3.4

5

The points scored by seven teams in a quiz competition are 10, 25, 13, 18, 19, 20, 25. Find the following:

a.    Mean: 18.57

 

b.    Median: 19

 

c.    Mode: 25

 



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