Bio – Chapter 11: Biostatistics

1

What does a bar chart use to represent data?

A Lines B Bars of equal width C Points D Slices

2

What is the primary focus of biostatistics?

A Study of chemical reactions in living organisms B Application of statistical methods to biological data C Study of fossils and evolution D Classification of organisms

3

What is the mode of the data set: 4, 6, 6, 6, 8, 9?

A 4 B 6 C 8 D 9

4

If a data set has two modes, it is called:

A Unimodal B Bimodal C Trimodal D Multimodal

5

What is the mean of the numbers: 4, 8, 6, 10, 2?

A 5 B 6 C 7 D 8

6

In a bar chart, what does the height of each bar represent?

A The category label B The frequency or value for that category C The total number of categories D The average of all values

7

For a data set of plant heights, which measure of central tendency would be most appropriate if the data contains outliers?

A Mean B Median C Mode D Variance

8

In a bar chart representing the number of different species in a habitat, what does the height of each bar indicate?

A The total number of species in the habitat B The frequency or count for that species C The average number of species per habitat D The median number of species

9

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

10

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

A Mean B Median C Mode D Average

11

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

12

Which of the following is an application of biostatistics in biological research?

A Measuring the rate of photosynthesis in plants B Analyzing the results of a clinical trial C Observing the behavior of animals in the wild D Classifying organisms into taxonomic groups

13

In a bar chart, what is plotted on the horizontal axis?

A Frequency B Categories or discrete values C Mean D Median

14

The median is the middle value when the data is:

A Arranged in order B Added together C Counted D Multiplied

15

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

A 3 B 4 C 4.5 D 5

16

The mean is calculated by:

A Summing all values and dividing by the number of values B Arranging values in order and finding the middle value C Finding the most frequent value D Subtracting the smallest value from the largest value

17

Which of the following is NOT a measure of central tendency?

A Mean B Median C Mode D Range

18

In a bar chart, the height of each bar represents:

A The category name B The frequency or value C The median D The mean

19

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

A 1 B 2 C 3 D 4

20

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

21

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

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

22

Which measure of central tendency is the most frequent value in a data set?

A Mean B Median C Mode D Average

23

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

24

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

25

What is the median of the data set: 3, 7, 7, 2, 9?

A 2 B 7 C 9 D 3