Assume that 10% of people are left-handed. Suppose 10 people are selected at random. a) Find the
Question:
Assume that 10% of people are left-handed. Suppose 10 people are selected at random.
a) Find the mean and standard deviation of the number of right-handers in the group.
μ= ? right-handers
σ= ? right-handers
(Round to two decimal places as needed.)
b) What's the probability that they're not all right-handed? (Round to three decimal places as needed.)
c) What's the probability that there are no more than 9 righties? (Round to three decimal places as needed.)
d) What's the probability that there are exactly 5 of each? (Round to five decimal places as needed.)
e) What's the probability that the majority is right-handed? (Round to three decimal places as needed.)
Statistics for Business and Economics
ISBN: 978-0321826237
12th edition
Authors: James T. McClave, P. George Benson, Terry T Sincich