Market share of Crest toothpaste last year Percentage of people who brush their
ID: 3387167 • Letter: M
Question
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
Key Variables variability Acceptable Error Confidence LevelMarket share of Crest toothpaste last year
23% Share 4% 95%Percentage of people who brush their teeth 2x per day
unknown 5% 99%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
unknown 1/2 a Point on the scale 95%Explanation / Answer
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.
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