To estimate the mean weekly allowance for children in a city, a survey is conducted among 25 children at an amusement park. The mean weekly allowance among those surveyed is $10. Which of the following best describes the sample and the estimated mean?
The sample mean is likely greater than the true city mean, as the children at the amusement park may not represent all children.
The sample mean exactly predicts the citywide mean.
The estimated mean is unbiased due to adequate sample size.
The estimated mean is valid since it uses monetary amounts.
