We want to estimate the average coffee intake of Coursera students, measured in cups of coffee. A survey of 1,000 students yields an average of 0.55 cups per day, with a standard deviation of 1 cup per day. Which of the following is not necessarily true?
A. The sample distribution is right skewed.
B.0.55 is a point estimate for the population mean.
C. μ=0.55, Ï=1
D. x bar = 0.55, s=1