1) A poll is conducted by randomly selecting 30 stockholders from each of the 50 states. Which answer describes the values obtained?
a. ordinal
b. nominal
c. discrete
d. continuous
2) Which parameter is most likely to be a good estimate of the mean amount of sugar in each gram of cereal consumed by the population of all Americans eating cereal?
a. Standard deviation
b. Mean
c. Mode
d. Median
3) The Queen Mary sails between England and the U.S. Stowaways are sometimes found on board. The ages (years) of stowaways from eastbound and westbound crossings are given below. Eastbound: 24, 24, 34, 15, 19, 22, 18, 20, 20, 17 Westbound: 41, 24, 32, 26, 39, 45, 24, 21, 22, 21 Find the mean of the eastbound and the mean of westbound.
a. East 21.3, West 29.5
b. East 20.0, West 25.0
c. East 25.4, West 28.5
d. East 19.7, West 21.3
4) Sandy is the world's tallest woman, with a height of 91.25 inches. Women have heights with a mean of 63.6 inches and a standard deviation of 2.5 inches. What is the difference between Sandy's height and the mean height of women?
a. 31.65 inches
b. 29.75 inches
c. 11.06 inches
d. 27.65 inches
5) A sample space consists of 10 separate events that are equally likely. What is the probability of each?
a. 0.5
b. 1
c. 0.1
d. 0
6)The U.S. General Accounting Office tested the I.R.S. for correctness of answers to taxpayer's questions. For 1,733 trials the I.R.S. was correct 1,107 times. Find the probability that a randomly selected taxpayers question will be answered incorrectly.
a. .333
b. .500
c. .450
d. .361
7)Use the binomial formula to compute the probability of 4 successes out of 6 trials, where the probability of success on each trial is .75.
a. .250
b. .279
c. .297
d. .911
8) Find the probability that at most 2 subjects experience headaches given we have a binomial distribution with n=6 and p=.167.
a. .9374
b. .0006
c. .1626
d. .2014