Market share of Crest toothpaste last year Percentage of peo

Market share of Crest toothpaste last year

Percentage of people who brush their teeth 2x per day

Likelihood to switch toothpaste brands the next time they purchase toothpaste (scale of 1-7 where 1 = extremely likely and 7 = not at all Likely

Which of the following is the correct sample size to understand how likely Crest buyers are to switch brands the next time they buy toothpaste?

a.21

b.36

c.84

d.145

Let’s assume Crest’s annual survey is among a random sample of US residents between the ages

of 18 to 75 who registered on the Crest website as a product user. Which sampling method is Crest using to conduct this survey?

a.Probabilistic Sampling

b.Non-Probabilistic Sampling

c.A mix of both Probabilistic Sampling and Non Probabilistic Sampling

d.None of the above

Using the same survey methodology: random sample of US residents between the ages of 18 to 75 who registered on the Crest website as a product, Crest wants to divide the research population into heterogeneous groups based on age and gender and then draw a random sample from each of the different groups. Based on this information, what type of sampling method would Crest use to conduct this survey?

a. Convenience Sampling

b. Cluster Sampling

c. Simple Random Sampling

d. Stratified Sampling

Solution

2) the method crest is using here is a mix of probabilistic sampling and non probabilistic sampling as it uses the confidence interval tool which itself a tool a mix of both.