1.The Tortilla Lady/Rising Hy is creating a forecast for their tortillas using time-series data. The weekly demand data goes up and down, but is gradually moving upward over time. This type of demand behavior is

a. random variations.

b. cyclical.

c. seasonality.

d. a trend.

2.Arbor Tea is an online retailer of organic teas. Over the last 20 weeks the manager at Arbor Teas has been recording the number of ontime shipments. The manager wants to create an control chart to monitor the percentage of ontime shipments. Which of the quality control charts should the manager use?

a. P chart

b. C chart

c. X Bar chart and R chart

d. Pareto chart