Section 2.3 Homework

2.  If we have a large voluntary response sample consisting of weights of subjects who chose to respond to a survey posted on the​ Internet, can a graph help to overcome the deficiency of having a voluntary response​ sample?

Choose the correct answer below.

1. No, a graph cannot help to overcome the deficiency. If the sample is a bad​ sample, there are no graphs or other techniques that can be used to salvage the data.
2. No, a graph cannot help to overcome the deficiency. Before​ graphing, all inaccurate values and outliers must be removed from the data set.
3. ​Yes, a graph can help to overcome the deficiency. Any graph that is given with a sufficiently accurate description of any deficiencies in the sampling technique is no longer considered biased.
4. Yes, a graph can help to overcome the deficiency. Certain graphs that hide any specific values in the​ data, such as pie​ charts, can be used to hide deficiencies in the sampling technique.