FREE AST Data Analysis Questions and Answers
What is the median of the following data set: 12, 15, 18, 20, 22?
Correct!
Wrong!
The median is the middle value of an ordered data set. Since the data is already ordered, the middle value is 18.
A graph shows monthly sales figures for a year. Which of the following is NOT a valid conclusion you can draw?
Correct!
Wrong!
Conclusions about future trends cannot be drawn solely from past data unless additional context is provided.
If a bar graph shows a category with zero frequency, what does this indicate?
Correct!
Wrong!
A zero frequency means no data points were recorded for that category.
A survey showed 40% of respondents prefer brand A, 35% prefer brand B, and 25% prefer brand C. If there were 200 respondents, how many preferred brand B?
Correct!
Wrong!
To find the number of respondents preferring brand B, calculate
200×0.35=70.
Which type of graph is best suited for showing the proportion of different categories in a data set?
Correct!
Wrong!
Pie charts are effective for displaying proportions and percentages of a whole.