The data used in data mining typically come from that store huge amounts of data that have been prepared for data mining analysis by being cleaned of errors and redundancy.
a. information clearinghouses
b. data warehouses
c. data extractions
d. competitive intelligence sources
e. internet databases

Which stage of group development involves members introducing themselves to each other?

Alarge university wanted to study the relationship between completing an internship during college and students' future earning potential. prom the same graduating class, they selected a random sample of 80 students who completed an internship and 100 students who did not complete an internship and examined their salaries five years after graduation. they found that there was a statistically higher mean salary for the internship group than for the noninternship group. which of the following interpretations is the most appropriate? a. there could be a confounding variable, such as student major, that explains the difference in mean salary between the internship and no internship groups.b. we cannot infer anything from these data since the distribution of salaries is likely right skewed.c. you cannot draw any valid conclusions because the sample sizes are different.d. more students should complete internships because having an internship produces a higher salary.

Differentiate between the trait, behavioral, and results-based performance appraisal systems, providing an example where each would be most applicable.