Final answer:
To determine the percentage of customers who shop online before coming to the store, the company should conduct a survey of a representative sample of customers. The sample size needed can be determined using statistical formulas.
Step-by-step explanation:
The survey question asks for the percentage of customers who shop online before coming to the store. To determine this, the company should conduct a survey of a representative sample of customers. The sample size needed for the survey can be determined using statistical formulas. For example, if the company wants to be 90% confident that the estimated proportion is within 5 percentage points of the true population proportion, with a sample proportion of 0.50, they can use the formula:
sample size = ((Z^2 * p' * (1-p')) / (E^2))
where Z is the z-score for the desired confidence level, p' is the sample proportion, and E is the desired margin of error. By plugging in the values, the company can calculate the sample size required to estimate the percentage of customers who shop online before coming to the store.