Statistics questions | form three Basic Mathematics

The heights of 50 plants recorded by a certain researcher are given below:

1. Copy and complete this tally table for the data given above.

Use this table to:

2. Draw a histogram for the height of the plants.
3. Find the mean height of the plants ( do not use the assumed mean method).
4. Find the median of the heights of the plants.

Answer / Solution

UNSOLVED

The following were the scores of 35 students in a mathematics mock examination:

07, 19, 78, 53, 43, 67, 112, 54, 27, 22, 33, 80, 25, 58, 50, 36, 65, 33, 16, 19, 34, 20, 55, 27, 37, 41, 04, 32, 48, 28, 70, 31, 61, 08, 35.

1. Prepare the frequency distribution table using the class intervals 0-9, 10-19, 20-29, etc.
2. Which class interval has more students?
3. Represent the information in a histogram and a frequency polygony and then find the mode.
4.  Calculate the median mark.

Answer / Solution

UNSOLVED

Carefully study the frequency distribution table which shows marks for 40 students in History examination.

Determine

1. The mean, given the assumed mean is 50.5
2. the median
3. Modal class and its corresponding class mark.

Answer / Solution

UNSOLVED

The heights of some plants grown in a laboratory were recorded after 5 weeks. The results are shown in the following table:

1. Calculate the mean and mode.
2. Draw a cumulative frequency curve for the data.
3. Estimate the median from the graph.

Answer / Solution

UNSOLVED

In a survey of the number of children in 12 houses , the following data resulted: 1, 2, 3, 4, 2, 2, 1, 3, 4, 3, 5, 3.

1. Show the data in a frequency distribution table.
2. Draw a histogram and a frequency polygon to represent this data.
3. Calculate the mean and mode number of children per house.

Answer / Solution

UNSOLVED