Cumulative Frequency Distribution of Less Than Type

Q.

Which of the following are the possible ages of ${27}^{th}$ and ${32}^{nd}$ observations in the given grouped distribution in increasing order of age? All the persons (observations) part of the distribution have exact integral ages.

$$\begin{array}{cc}Agelessthan& Numberofpeople\\ 15& 3\\ 16& 11\\ 17& 21\\ 18& 31\\ 19& 36\\ 20& 40\end{array}$$

1. 15, 16
2. 17, 18
3. 18, 19
4. 14, 15

Q. Following table shows a frequency distribution for the speed of cars passing through at a particular spot on a high way.

$\begin{array}{cc}\text{Class interval}& \text{Frequency}\\ \text{(km/h)}& \\ 30-40& 3\\ 40-50& 6\\ 50-60& 25\\ 60-70& 65\\ 70-80& 50\\ 80-90& 28\\ 90-100& 14\end{array}$

Draw a histogram and frequency polygon representing the data above.

Q.

Question 92

Draw a histogram to represent the frequency distribution in question 91. ?

Q. A pictorial representation of the grouped data in which rectangles are formed with class intervals as the bases and the corresponding frequencies as the heights is known as

1. Bar graph
2. Pie chart
3. Double bar graph
4. Histogram

Q.

The times (in seconds) taken by 150 athelets to run a 110 m hurdle race are tabulated below

$\begin{array}{ccccccc}\text{Class}& 13.8-14& 14-14.2& 14.2-14.4& 14.4-14.6& 14.6-14.8& 14.8-15\\ \text{Frequency}& 2& 4& 5& 71& 48& 20\end{array}$

The number of atheletes who completed the race in less than 14.6 s is

1. 11

2. 82

3. 130

4. 71