Question

A McDonald's franchisee wants to estimate the mean dollars spent by adults who visit their stores with at least one child. Determine the sample size (n) needed to estimate the mean dollars spent by adult visitors bringing children.

a. 245.86
b. 12.05
c. 2.035
d. 1.96

Answer 1

The sample size needed depends on the desired level of confidence and margin of error.

Step-by-step explanation:

The sample size (n) needed to estimate the mean dollars spent by adult visitors bringing children depends on the desired level of confidence and margin of error. Assuming a normal distribution, we can use the formula:

n = (Z * s / E)^2

where Z is the Z-score corresponding to the desired level of confidence, s is the estimated standard deviation, and E is the desired margin of error.

Since we don't have the necessary information to calculate n, none of the provided options (a. 245.86, b. 12.05, c. 2.035, d. 1.96) can be the correct answer.