Histogram for Classes with Equal Size

Q. Histograms are used to represent the frequency of a particular range of data.

1. False
2. True

Q.

The following histogram represents the life time of different lamps, find the number of lamps

(i) have life time of more than 700 hours

(ii) The number of lamps have life time of between 600 and 700 hours

1. (i) 184 (ii) 86

2. (i) 148 (ii) 76

3. (i) 164 (ii) 26

4. (i) 144 (ii) 68

Q.

In histogram, if widths of the rectangles are varying, then lengths of rectangles are modified to be proportionate to the __________________ class size

Q. A histogram is a pictorial representation of the grouped data in which class intervals and frequency are respectively taken along

(a) vertical axis and horizontal axis

(b) vertical axis only

(c) horizontal axis only

(d) Horizontal axis and vertical axis

Q. From the given histogram. How may lamps have a lifetime of more than $700$ hours?​

1. $184$
2. $85$
3. $100$
4. $84$

Q.

Histogram and bar graph are two names of the same type of graph.

1. False

2. True

Q. The following table gives the lifetimes of 400 neon lamps:

$\begin{array}{cccccccc}\text{Lifetime}& 300-400& 400-500& 500-600& 600-700& 700-800& 800-900& 900-1000\\ \text{(in hr)}& & & & & & & \\ \text{Number}& 14& 56& 60& 86& 74& 62& 48\\ \text{of lamps}& & & & & & & \end{array}$
(i) Represent the given information with the help of a histogram.
(ii) How many lamps have a lifetime of more than 700 hours?

Q. A survey was undertaken to judge the inclination of students towards business and service in five different schools. Draw subdivided bar diagram for the following data
figure

Q. Histograms are used to represent the frequency of a particular range of data.

1. True
2. False

Q.

The height of the rectangle in a histogram is proportional to __________.

1. x-axis

2. z-axis

3. class interval

4. frequency of the class interval

Q. When constructing a histogram with non-uniform (unequal) class widths, we must ensure that the areas of the rectangles are proportional to the ___________.

1. Class width
2. Class frequencies
3. Range
4. Class sizes

Q. Read the following bar graph (Fig.) and answer the following question:What information is given by the bar graph?

Q. The following table gives the lifetimes of 400 neon lamps:

$\begin{array}{cccccccc}\text{Lifetime}& 300-400& 400-500& 500-600& 600-700& 700-800& 800-900& 900-1000\\ \text{(in hr)}& & & & & & & \\ \text{Number}& 14& 56& 60& 86& 74& 62& 48\\ \text{of lamps}& & & & & & & \end{array}$
(i) Represent the given information with the help of a histogram.
(ii) How many lamps have a lifetime of more than 700 hours?

Q.

Which of the following is correct histogram for the given data?

1. 

2. 

3. 

4. None of these