Acompany makes auto batteries. they claim that 9 % or their ll70 batteries are good for 70 months or longer. assume that this claim is true. let p be the proportion in a random sample of 60 such batteries

a. what is the probability that this sample proportion is within 0.02 of the population proportion? round your answer to two decimal places.
b. what is the probability that this sample proportion is less than the population proportion by 0.05 or more? round your answer to two decimal places.

Cosmetic profits. sally is the executive vice president of big name cosmetics company. through important and material, nonpublic information, she learns that the company is soon going to purchase a smaller chain of stores. it is expected that stock in big name cosmetics will rise dramatically at that point. sally immediately buys a number of shares of her company's stock. she also tells her friend alice about the expected purchase of stores. alice wanted to purchase stock in the company but lacked the funds with which to do so. although she did not have the funds in bank a, alice decided to draw a check on bank a and deposit the check in bank b and then proceed to write a check on bank b to cover the purchase of the stock. she hoped that she would have sufficient funds to deposit before the check was presented for payment. of which of the following offenses, if any, is alice guilty of by buying stock?

The last time he flew jet value air, juan's plane developed a fuel leak and had to make an 4) emergency landing. the time before that, his plane was grounded because of an electrical problem. juan is sure his current trip will be fraught with problems and he will once again be delayed. this is an example of the bias a) confirmation b) availability c) selective perception d) randomness

Amajor advantage of case studies is