Question

A marketing survey is conducted in which students are to taste two different brands of soft drink. Their task is to correctly identify the brand tasted. A random sample of 190 students is taken. Assume that the students have no ability to distinguish between the two brands. Complete (a) through (d) below. (Round to four decimal places as needed.) b The probability is 90% that the sample percentage is contained w thin what symmetrical imrts of he population percentage? dentry e mits he pulation percentage. The lower limit is The upper limit is (Round to four decimal places as needed.) There s a 90% probability that the sample percentage will be contained within (Round to the one decimal place as needed.) % symmetrically around the population percentage c. what is the probability that the sample percentage of correct identifications is greater than 60%? (Round to four decimal places as needed.) d. Which is more likely to occur more than 60 correct identifications in a sample 0 190 or more than 55% correct identifications in a sample o O? Expan. Define more than 60% correct identifications in a sample of 190 as event 1 and define more han 55% correct identifications na sample of 1 0 as even 2. OA. They are equally liely. O B. Event 2 is more likely because the Z-value for it is greater than the Z-value for event 1, and therefore its probability is greater than that of event 1 ° C. Event 1 is more likely because the Z-value for it is less than the Z-value for event 2, and therefore its probability is greater than that of event 2 O D. It cannot be determined from the information given.

Answer 1