Statistics questions

The following table shows marks scored by Form Two students in a Mathematics test at Jitahidi Secondary School.

(a) What was the lowest mark?
(b) What mark was scored by the most students?
(c) If 50% was the pass mark, how many students passed the test?
(d) What was the percentage of the students who scored at least 50 percent?

The scores of a mathematics test by 50 Form Two pupils in a certain school are as shown in the following table.

(a) Find the value of “b” and calculate the number of students who scored 55% and above.
(b) Calculate the mean score.

The table below shows the masses in kilogrammes of Form one students at Mtakuja Secondary School

(i) Find the total number of students

(ii) Draw a frequency polygon and histogram on the same axes

The following marks were obtained by 32 students in a physics examination:
32, 35, 42, 50, 46, 29, 39, 38, 45, 37, 48, 52, 37, 58, 52, 48, 36, 54, 37, 42, 64, 37, 34, 28, 58, 64, 34, 57, 54, 62, 48, 67.
(a) Prepare a frequency distribution table using the class intervals: 24 29, 30 35 etc.
(b) Draw the histogram.
(c) Draw the cumulative frequency curve and use it to estimate the median.
(d) Find the mean mark.

The following distribution table shows the scores of 64 students in a Chemistry weekly test.

1. Calculate the mean and mode.
2. Draw the ogive and use it to estimate the median: