Histograms

Q.

i) Percentage of people in the height range 149.5 -159.5cm is equal to ______.

ii) Percentage difference between the number of people in the height range 159.5 - 169.5cm and 169.5 - 179.5cm is____.

1. 20 , 6.66%

2. 30 , 16.66 %

3. 20 , 16.66 %

4. 30 , 6.66 %

Q. The graph below shows the number of people of different age groups staying in a hotel. Find the correct statement(s) among the options.

1. Total number of people in 0-20 age group is 10
2. Total number of people in 0-20 age group is 5
3. Maximum number of people are from age group of 21-30 years
4. Total number of people staying in the hotel is 35

Q. The figure below shows a histogram of heights of cherry trees. Find the correct statement(s) among the options.

1. Total number of trees is 31
2. The most common range of height of trees is 70-75 feet
3. Least common range of height is 85-90 feet
4. Total number of trees is 32

Q.

Bar graphs are usually used to represent 'categorical data' while histogram are usually used for 'continuous data' .

1. True

2. False

Q.

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

1. z-axis

2. x-axis

3. class interval

4. frequency of the class interval

Q.

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

1. 

2. 

3. 

4. None of these

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 sizes
3. Class frequencies
4. Range

Q. A histogram can never have gaps between two bars.

1. True
2. False

Q.

If two bars in a histogram have unequal widths but the same height, then which class interval will have a higher density of observations?

1. The one with higher class width

2. The one with lower class width

3. Can't say

4. Both have same density

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

1. False
2. True