Bio – Chapter 11

1

In biological research, why is the mean often used to describe data?

A It is always equal to the median B It uses all data points in its calculation C It is the most frequent value D It is not affected by outliers

2

In biostatistics, data collection is important because:

A It provides the raw information for analysis B It helps in drawing bar charts C It calculates the mean D It determines the mode

3

For the data set: 2, 3, 4, 4, 5, 6, the median is:

A 3 B 4 C 4.5 D 5

4

For the data set: 5, 7, 7, 8, 10, what is the mode?

A 5 B 7 C 8 D 10

5

If the mean of 5 numbers is 10, what is their sum?

A 2 B 5 C 50 D 15

6

What is the mode of the following data set? 2, 3, 3, 5, 7, 3, 8

A 2 B 3 C 5 D 7

7

A bar chart is most useful for:

A Showing trends over time B Comparing quantities of different categories C Showing parts of a whole D Showing correlation between variables

8

When is the median a better measure of central tendency than the mean?

A When data is normally distributed B When data has no outliers C When data has extreme values D When data is categorical

9

Biostatistics is important in biology because it helps to:

A Collect and analyze data B Draw conclusions from data C Make informed decisions D All of the above

10

In biological research, the mean is often used to:

A Represent the average value of a sample B Show the most frequent value C Show the middle value D Show the spread of data

11

What is the advantage of using the median over the mean?

A It uses all data values B It is not affected by extreme values C It is easier to calculate D It is always a whole number

12

Which of the following is an example of discrete biological data?

A Height of students B Weight of students C Number of petals on a flower D Blood pressure

13

What does a bar chart use to represent data?

A Lines B Bars of equal width C Points D Slices

14

Which measure of central tendency is defined as the middle value when data is arranged in order?

A Mean B Median C Mode D Range

15

Which measure of central tendency can be calculated for categorical data?

A Mean B Median C Mode D Range

16

Which graph is best for showing the frequency of discrete categories?

A Line graph B Pie chart C Bar chart D Scatter plot

17

Which type of graph is best for showing the frequency of discrete categories?

A Line graph B Bar chart C Pie chart D Scatter plot

18

Which measure of central tendency is used when data has outliers?

A Mean B Median C Mode D Sum

19

Which of the following data sets has a mean of 5?

A 2, 4, 6, 8 B 1, 2, 3, 4, 5 C 3, 3, 5, 5 D 4, 5, 6, 7

20

The sum of all values divided by the number of values is called the:

A Median B Mode C Mean D Range

21

In a bar chart representing the number of students who prefer different types of fruits, what does the height of each bar represent?

A The type of fruit B The number of students C The color of the fruit D The size of the fruit

22

What is the main purpose of data collection in biostatistics?

A To gather information for analysis B To draw graphs C To calculate the mean D To find the mode

23

The median is the middle value when the data is:

A Arranged in order B Added together C Counted D Multiplied

24

A bar chart shows the number of students who prefer different fruits. The bar for mango is tallest. This means:

A Mango is the least preferred fruit B Mango is the most preferred fruit C Mango is the average fruit D Mango is the median fruit

25

What is the mode of the data set: 1, 2, 2, 3, 3, 3, 4?

A 1 B 2 C 3 D 4