1 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
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 What is biostatistics? A The study of living organisms B The application of statistics to biological data C The study of chemicals in living things D The study of fossils
5 Why is biostatistics important in biological research? A It helps to collect data B It helps to analyze and interpret data C It helps to draw charts D All of the above
6 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
7 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
8 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 Which measure of central tendency is most affected by extreme values in a dataset? A Mean B Median C Mode D Range
11 Which measure of central tendency is the middle value when data is arranged in order? A Mean B Median C Mode D Average
12 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
13 The median is the middle value when the data is: A Arranged in order B Added together C Counted D Multiplied
15 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
16 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
17 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
18 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
19 In a bar chart, what is plotted on the horizontal axis? A Frequency B Categories or discrete values C Mean D Median
20 In a bar chart showing the number of students with different blood groups, what does the x-axis typically represent? A Frequency B Blood groups C Percentage D Mean
23 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
24 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
25 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