9th Class Biology Chapter 11 TestBiostatistics

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. lf is the value 155+160/2, then median of this value is:

   1. 157.5

   2. 157.6

   3. 157.7

   4. 157.9

2. Which use of biostatistics help in planning vaccination campaigns:

   1. Predicting outcomes

   2. Public health 

   3. Policy making

   4. None

3. Which helps to summarize and identify data set:

   1. Mean 

   2. Median

   3. Mode 

   4. All

4. When the number of values in a data set is even, how is the median calculated?

   1. By choosing the middle value 

   2. By taking the average of the two middle values

   3. By selecting the most frequent value

   4. By adding all values and dividing by the total number of values

5. The middle value of a data set when the values are arranged in ascending or descending order is called:

   1. Mean

   2. Median

   3. Mode

   4. None above

6. When constructing a bar chart, which axis usually represents the categories?

   1. Vertical axis (y-axis)

   2. Horizontal axis (x-axis)

   3. Both axes equally represent the categories

   4. Neither axis represents the categories

7. Which study is used to identify genetic marker:

   1. Epidemiology

   2. Genetics 

   3. Agriculture

   4. Clinical trials

8. Biostatistics is essential for:

   1. Designing biological experiments

   2. Clinical trials

   3. Epidemiological studies

   4. All above

9. The graphical representation of data called:

   1. Bar chart

   2. Data

   3. Both

   4. None

10. Median is average of two middle value, if number of values is:

    1. Even

    2. Odd 

    3. Both

    4. None