Probability
Probability
Statistics
Statistics
100
One card is selected at random from a deck of cards. Determine the probability that the card selected is
(a) the five of diamonds
(b) a card greater than 5 and less than 9
(a) 1/52
(b) 3/13
100
One card is selected from a standard deck of cards, determine the odds against selecting a queen.
12:1
100
A mean average of 80 or greater for five exams is needed for a final grade B in a course. Jim’s first four exams scores are 73, 69, 85, and 80. What grade does he need on fifth exam to get a B in the course?
93
100
Use the table to determine the percent of specified.
(a) Greater than z = 2.66
(b) Between z = - 1.53 and z = - 1.82
(a) 0.39%
(b) 2.86%
200
If a stock clerk selects a jar at random form the shelf, determine the probability that the jar he or she selects is (a) Old El Paso (b) Tacl Bell medium taco sauce.
(a) 11/42
(b) 4/21
200
The odds against a rock concert selling are 2:9. Determine the probability the concert does not sell out.
2/11
200
Assume that the mathematics score on the SAT are normally distributed with a mean of 500 and a standard deviation of 100. What percent of students who took the test have mathematics score below 300?
2.28%
300
Bobbi, an investment counselor estimates that if the tax law does not change, the client will make $15,000 but if the tax law changes, the client will lose $4,000. Determine the client's expected value if there is 20% chance the tax law will change.
$11,200
300
1/12
300
The total cholesterol level of 10 patients of Dr. Novak are: 176, 202, 285, 153, 200, 182, 248, 132, 214, and 195. Determine the (a) mean (b) median (c) mode and (d) mid range.
(a) 198.7(b) 197.5
(c) No mode (d) 208.5
400
A new medicine was given to a sample of 100 hospital patients. Of the total, 70 patients reacted favorably, 10 reacted unfavorably, and 20 were unaffected by drug. If this medicine is given to Mr. and Mrs. Rivera and their son Carlos, what is the probability that Mr. and Mrs. Rivera reacts favorably, and Carlos is unaffected. (Assume Independence)
49/500
400
If one of these light bulbs selected at random, determine the probability that the light bulb is defective, given that the light bulb is 20 watts.
3/19
400
Determine the range and standard deviation of the following prices of selected camping tents: $109, $60, $80, $60, $210, $250, $60, $100, $115.
Range: $190
Standard deviation: $68.74
500
The age of a random sample of 40 people attending a symphony are
(a) Construct a frequency distribution with a first class of 20 -30.
(b) Construct a histogram.
