Arandom sample of size n1 = 16 is selected from a normal population with a mean of 75 and a standard deviation of 9. a second random sample of size n2 = 8 is taken from another normal population with mean 69 and standard deviation 10. let x1 and x 2 be the two sample means. find: a. the probability that x1 - x2 exceeds 4.b. the probability that 4.3 < = x1 - x2 < = 5.0.

Which math sentence can be used to determine if the triangle is a right triangle?

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?