Question

The manipulated variable levels Continuous (i.e. time in years) or Clumped into groups( i.e. 0-5 years, 6-10 years) is represented as _________

(a) Continuous- Scatter plot/line, Clumped- Histogram

(b) Continuous- Histogram, Clumped- Scatter plot/line

(c) Continuous- Pie chart, Clumped- Scatter plot/line

(d) Continuous- Pie chart, Clumped- Histogram

This question was addressed to me in final exam.

Question is taken from Graph Paper with Logarithmic Coordinates in portion Presentation and Analysis of Data of Bioprocess Engineering

Answer 1

Correct answer is (a) Continuous- Scatter plot/line, Clumped- Histogram

Explanation: HISTOGRAM :

Histograms are similar to bar graphs except the data represented in histogram is usually in groups of continuous numerical (quantitative) data. In this case, the bars do touch. Histograms are often used to show frequency data.

Example- Average mean temperature between the years 1900 and 2000

SCATTER- PLOT:

The points are plotted on the grid, but they are not joined point to point. A best fit line may be added to a scatter plot to show a trend. Line graphs are only used when both variables are quantitative. These graphs are useful for showing if a correlation exists between two variables, especially when it is not possible to alter either of the variables (i.e. in descriptive studies).

Example – Reaction rate at various enzyme concentrations.