A federal agent is posing as an arms trafficker and offers to sell Mark illegal guns (the agent does not coerce Mark to buy the guns). If Mark buys the guns which of the following defenses may Mark assert at his criminal trial?

A retail chain would like to test if a difference exists between the variability of customer satisfaction scores from two locations

The following data represents satisfaction scores from a random sample of customers from these locations on a scale of 1-20.Location 1 12 14 20 18 15 17 16Location 2 18 19 17 18 16 20 Using ? = 0.10, the conclusion for this hypothesis test would be that because the test statistic is ____________________________.A) more than the critical value, we fail to reject the null hypothesis and conclude that a difference exists between the variability of customer satisfaction scores from two locations B) more than the critical value, we reject the null hypothesis and cannot conclude that a difference exists between the variability of customer satisfaction scores from two locations C) less than the critical value, we can reject the null hypothesis and conclude that a difference exists between the variability of customer satisfaction scores from two locations D) less than the critical value, we fail to reject the null hypothesis and cannot conclude that a difference exists between the variability of customer satisfaction scores from two locations

Given a population in which the probability of success is p =0.20, if a sample of 500 items is taken, then calculate the probability the proportion of successes in the sample will be between 0.18 and 0.23

A) 0.7812 B) 0.8221 C) 0.9212 D) 0.6812