The probability of concluding that only random variation exists when in fact assignable (non-random) variation is present is: I. the probability of a Type I error
II. known as the alpha risk
III. highly unlikely
IV. the sum of probabilities in the two tails of the normal distribution.
A) I and II
B) I and IV
C) II and III
D) I. II, and III
E) I, II, and IV

Cool beans is a locally owned coffee shop that competes with two large coffee chains, planeteuro and frothies. alicia, the owner, hired two students to count the number of customers that entered each of the coffee shops to estimate what percent of people who are interested in coffee are visiting each shop. after a week, the students found the following results: 589 visited cool beans, 839 visited planeteuro, and 1,290 visited frothies. the students were surprised that cool beans had 139 visits on monday which represented 59% of all people who visited one of the three coffee shops on mondays. how many people visited one of the three coffee shops during the week?

Sonic corp. manufactures ski and snowboarding equipment. it has estimated that this year there will be substantial growth in its sales during the winter months. it approaches the bank for credit. what is the purpose of such credit known as? a. expansion b. inventory building c. debt management d. emergency maintenance

Zoe would like to be able to save for night courses at the local college. which of these would be a good way for zoe to make more money available for savings without dramatically changing her budget? economía