Question

A new soft drink is being test-marketed to estimate the proportion of consumers who will like the new drink. The sampled population is all _____ and it is _____ population. The population _____ of interest is the proportion of consumers who will like the new drink and it is estimated by sample _____ of consumers who will be interested in the new drink. (Fill in the missing blanks)

	a.	People, infinite, variable, size
	b.	People, finite, parameter, population
	c.	People, infinite, parameter, proportion

Answer 1

The sampled population is all people since they are the ones who are consuming the drink.

Population size should be very large, so we consider it as infinite in testing.

Now, we have to estimate population parameter. Just remember that parameters belong to population and statistics belong to samples. Also, parameters are constant like etc. so they cannot be variable.

And the parameter of interest is proportion, so we need the sample proportion to estimate in our z-test.

Hence, option c is correct.