20 students scored goals for the school football team last month. The table gives information about the number of goals they have scored. Find the mean.

Goals scored No. of students

1 9

2 3

3 5

4 3

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Solution

Goals Frequency fi x xi

1 9 9

2 3 6

3 5 15

4 3 12

$\frac{\sum f i \times x i}{N}$ = $\frac{42}{20}$

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Similar questions

The following is the record of goals scored by team A in a football session:

No. of goals scored	0	1	2	3	4
No. of matches	1	9	7	5	3

For the team B, mean number of goals scored per match was 2 with a standard

deviation 1.25 goals. Find which team may be considered more consistent?

Number of goals	$1$	$2$	$3$	$4$	$5$	$6$
Frequency	$12$	$10$	$12$	$14$	$18$	$16$

A

No.of goals scored	$0$	$1$	$2$	$3$	$4$
No.of matches	$1$	$9$	$7$	$5$	$3$

B

2

1.25

The following is the record of goals scored by team A in a football session :

$\begin{matrix} No. of goals scored & 0 & 1 & 2 & 3 & 4 No. of matches & 1 & 9 & 7 & 5 & 3 \end{matrix}$

For the team B, mean number of goals scored per match was 2 with a standard deviation 1.25 goals. Find which team may be considered more consistent ?

The following is the record of goals scored by team A in a football session:

$\begin{matrix} N o . o f g o a l s s c o r e d & 0 & 1 & 2 & 3 & 4 N o . o f m a t c h e s & 1 & 9 & 7 & 5 & 3 \end{matrix}$

For the team B, mean number of goals scored per match was 2 with standard deviation 1.25 goals. Find which team may be considered more consistent?

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