Question

The final scores for a statistics course of 35 students were as follows:

71.5 | 66.4 | 56.3 | 42.1 | 34.9 | 79.4 | 54.0
48.2 | 54.5 | 45.1 | 63.2 | 64.1 | 27.0 | 41.2
49.7 | 66.1 | 54.9 | 42.0 | 63.6 | 61.4 | 79.7
47.5 | 80.3 | 50.2 | 51.7 | 53.5 | 51.7 | 42.8
74.4 | 75.3 | 65.5 | 57.2 | 44.1 | 59.4 | 52.3

Produce a histogram, and draw some insights from the histogram.

Answer 1

In order to solve this question I used R software.

R codes and output:

x=c(71.5 , 66.4 , 56.3 , 42.1 , 34.9 , 79.4 , 54.0, 48.2 , 54.5 , 45.1 , 63.2 , 64.1 , 27.0 , 41.2, 49.7 , 66.1 ,54.9 , 42.0 , 63.6 , 61.4 , 79.7, 47.5 , 80.3 , 50.2 , 51.7 , 53.5 , 51.7 , 42.8,74.4 , 75.3 , 65.5 , 57.2 , 44.1 , 59.4 , 52.3)
> hist(x)

From histogram we see that distribution of marks of students is almost symmetric.

Lots of students (11) got marks in the range 50 to 60.