Randomly selected statistics students of the author participated in an experiment to test their ability to determine when 60 seconds had passed. Forty students yielded a sample mean of 58.3 seconds. Assume that б = 9.5 seconds. Construct a 95% confidence interval of the population mean of all statistics students.
Z D/2 = 1.96

The graph below shows the line of best fit for data collected on the number of cell phones and cell phone cases sold at a local electronics store on twelve different days. number of cell phone cases sold 50 * 0 5 10 15 20 25 30 35 40 45 number of cell phones sold which of the following is the equation for the line of best fit? a. y = 0.8x b. y = 0.2x c. y=0.5x d. y = 0.25x