Q1.Which types of charts can be used for time series data?
Q2: List Six deceptive graphical techniques.
Q3: A plumbing supplier's mean monthly demand for vinyl washers is 24,212 with a standard deviation of 6,053. The mean monthly demand for steam boilers is 6.8 with a standard deviation of 1.7. Compare the dispersion of these distributions. Which demand pattern has more relative variation? Explain.
Q4: Grace took a random sample of the number of steps per minute from the electronic readout of her aerobic climbing machine during a 1-hour workout.
(a) Calculate the mean, median, and mode.
(b) Which is the best measure of central tendency? The worst? Why? 90 110 97 144 54 60 156 86 82 64 100 47 80 164 93 Q5: As a birthday gift, you are mailing a new personal digital assistant (PDA) to your cousin in Toledo. The PDA cost $250. There is a 2 percent chance it will be lost or damaged in the mail. Is it worth $4 to insure the mailing? Explain, using the concept of expected value.