17. Suppose you collected data on a sample of UAE residents on their weekend spending habits. After performing descriptive statistics, you determined that 50% of the respondents in the sample spend less than 850 AED on the weekend, while the remaining 50% of the respondents spend more than 850 AED on the weekend. 850 AED represents which descriptive statistics for our sample?
A. Maximum weekend spending
B. Average weekend spending
C. Median weekend spending
D. Standard weekend spending
18. Which of the following statistics approximates the variability of responses in a population?
A. Range of the sample mean
B. Standard deviation of the sample mean
C. Standard error of the sample mean
D. Confidence interval