When using a control chart to test for statistical anomalies (special cause) which of the following is a true statement: (2) or more consecutive data points above the mean. (1) or more data points beyond (+/- 3 standard deviations from the mean. (4) data points are exactly the same. (3) data points in a row all increasing or decreasing.

A project team of a pharmaceutical company is using a t-test to study the differences between two groups of raw materials. They accept the null hypothesis, implying ... (select the best statement) There are correlations between the two groups. There are statistical differences in the populations between the two groups. There is no statistical difference in the populations between the two groups. The two populations are exactly the same.