Question

andrey works at a call center, selling insurance over the phone. while debating over which greeting he should use when calling potential customers - \howdy!\ or \hiya!\ - he decided to conduct a small study.

for his subsequent 500 calls, he chose one of the greetings randomly by flipping a coin. then, he compared the percentage of calls he succeeded in selling insurance using each greeting.

what type of a statistical study did andrey use?

choose 1 answer:

a sample study

b experiment

c observational study

Explanation:

An experiment is a statistical study where the researcher manipulates one or more variables (here, the greeting used) and randomly assigns subjects (the calls) to different groups (using "Howdy!" or "Hiya!") to observe the effect on a response variable (success in selling insurance). Andrey randomly chose the greeting (manipulation) and compared the success rates, which fits the definition of an experiment. A sample study is not a standard statistical study type in this context, and an observational study involves observing without manipulating variables (he manipulated the greeting here).

Answer:

B. Experiment