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$55.00 Econ Satistic Home work
- From Economics: General-Economics
- Closed, but you can still post tutorials
- Due on Jun. 30, 2009
- Asked on Jun 29, 2009 at 4:17:27PM
Q:
Text Book Elementary Statistics, Picturing the world
1) Mrs. Bass has 5 bracelets, 8 necklaces and 7 sets of earrings. In how ways can she select one of each to wear?
2) If a set of measurement has a mean of 45 and a standard deviation 5, convert the value of X into standard units where X = 55.
3) Find the indicated values: (a) 5! (b) 0! (c) 7! (d) _7!
3! 5! 2!
4) A random sample of 250 working adults found that 37% access the Internet at work, 44% access Internet at home, and 21% access it at both work and home. What is the probability that a person in this sample selected at random accesses the Internet at home or at work?
5) Suppose that P(A) = .6, P(B) = .3, and events A and B are mutually exclusive:
(a) Find the probability of A or B
(b) Find the probability of A and B
6) Find the number of ways in which a committee of 4 can be selected from among 45 members of a college fraternity.
7) If 20 paintings are entered in an art show, in how many ways can the judges award a first, second, and third prize?
8) How many distinguishable words can be formed from: (a) MISSISSIPPI (b) CALCULUS
9) Find: (a) the normal curve area which lies between z = .33 and z = .57; and,
(b) z if the normal curve area between z and + z is .7888
10) The number of ounces of soda that a vending machine dispenses per cup is normally distributed with a mean of 12 oz. and a standard deviation of 4 oz. Find the probability that:
(a) more than 16 oz. is dispensed in a cup; and,
(b) between 15 and 18 oz. are dispensed in a cup
1. An urn contains 2 red marbles, 3 blue marbles, and 5 green marbles. If two marbles are drawn with replacement, what is the probability that a blue marble first and a red marble second?
2. Given a well-shuffled standard deck of cards, what is the probability that you select:
a. a red Queen b. red or a Queen
3. A clothing store carries eight different jumpers, six slacks, and ten shirts. Picking one from each category, how many different outfits can be made?
4. Mrs. Bass has five bracelets, eight necklaces, and seven sets of earrings. In how many ways can she select one of each to wear?
5. a. Is 2! + 1! + 0! + 2! = 3! ? b. Is 7 C 5 = 7 C 2 ? c. Is 4 P 3 = 4 C 3 ?
6. Of 162 students honored, 48 won awards for mathematics and 78 won awards for English. Fourteen of these won awards for both. What is the probability that a student won an award for English or mathematics?
7. If 20 paintings are entered in an art show, in how many ways can the judges award a first, second, and third prize?
8. How many distinguishable words can be formed from: MASSACHUSETTS?
9. From a pool of fifteen candidates the offices of president, vice-president and secretary will be filled. In how many ways can the offices be filled if each candidate can hold any office?
10. When two cards are drawn from a well-shuffled deck of 52 playing cards, what are the probabilities of getting:
a. two aces b. two face cards c. two black cards
11. Find the percent of total area under the normal curve between the given values of z:
a. to the right of z = 2.04 b. z = .94 and z = 1.43
_________ ________
12. Find the value of z that corresponds to the cumulative area of .2643. z = _______
13. Public school students taking a mathematics assessment had a mean score of 290 with a standard deviation of 37. Possible test scores could range from 0 to 500. Assume that the test scores are normally distributed:
a. What percentage of the students had a score between 250 and 300? __________
b. What is the lowest score that would still place a student in the top 5% of the scores? ___________
14. Assuming a normal distribution, in order to be graded extra large, an egg must weigh at least 2.2 oz. If the average weight for an egg is 1.5 oz., with a standard deviation of 0.4 oz., how many of twenty dozen eggs would you expect to grade extra large? ____________
