6. Identify which sampling technique was used ineach study. Explain your reasoni

Question

6. Identify which sampling technique was used ineach study. Explain your reasoning.

(a) A journalist goes to a beach to ask people how they feelabout water

pollution.

(b) For quality assurance, every fifth engine part is selectedfrom an assembly

line and tested for durability.

(c) A study on attitudes about smoking is conducted at acollege. The

students are divided by class (freshman, sophomore, junior, andsenior).

Then a random sample is selected from each class andinterviewed.

7. Which sampling technique used in Exercise 6could lead to a biased study?

8. Determine whether each statement is true orfalse. If it is false, rewrite it as

a true statement.

(a) A parameter is a numerical measure that describes asample

characteristic.

(b) Ordinal datarepresent the highest level of measurement.

Explanation / Answer

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