A child between 10 and 12 years old looks at this probability distribution and asks, "Why are people more likely to buy toys for kids older than I am (13 and over) than for kids in my age group (10-12)?" How would you respond? (highlight right as tron, A or B)

A) The 13-and-older category may include children up to 17 or 18 years old. This is a larger category.

b) The 13-and-older category may include children up to 17 or 18 years old. This is a smaller category.

Question 16 Diagnostic tests of medical conditions can have several types of results. The test result can be positive or negative, whether or not a patient has the condition. A positive test (+) indicates that the patient has the condition. A negative test (-) indicates that the patient does not have

the condition. Remember, a positive test does not prove the patient has the condition. Additional medical work may be required. Consider a random sample of 200 patients, some of whom have a medical condition and some of whom do not. Results of a new diagnostic test for a condition are

shown.

Condition Present

Condition Absent

Row Total

Test Result +

107

23

130

Test Result -

25

45

70

Column Total

132

68

200

Assume the sample is representative of the entire population. For a person selected at random, compute the following probabilities. (Enter your answers as fractions.)

a)

e(+ | condition present); this is known as the sensitivity of a test. .) Ans

_P(- | condition present); this is known as the false-negative rate. .) Ans_

(c)

A- | condition absent); this is known as the specificity of a test. .) Ans

(d)

e(+ | condition absent); this is known as the false-positive rate. .) Ans_

e)_P(condition present and +); this is the predictive value of the test. .) Ans_

(9_ P(condition present and -)..) Ans

4.3/3Question #17There are seven wires which need to be attached to a circuit board. A robotic device will attach the wires. The wires can be attached in any order, and the production manager wishes to determine which order would be fastest for the robot to use. Use the multiplication rule of

counting to determine the number of possible sequences of assembly that must be tested. (Hint: There are seven choices for the first wire, six for the second wire, five for the third wire, etc.) Ans_

4.3/5Question #18 sales representative must visit seven cities. There are direct air connections between each of the cities. Use the multiplication rule of counting to determine the number of different choices the sales representative has for the order in which to visit the cities.

Ans_

4.3/8Question #19Compute P5,2. Ans_

4.3/10Question #20 Compute C7,2.

4.3/11 Question #21 There are three nursing positions to be filled at Lilly Hospital. Position 1 is the day nursing supervisor; position 2 is the night nursing supervisor; and position 3 is the nursing coordinator position. There are 15 candidates qualified for all three of the positions. Determine the

number of different ways the positions can be filled by these applicants.

4.3/12 Question #22In the Cash Now lottery game there are 15 finalists who submitted entry tickets on time. From these 15 tickets, three grand prize winners will be drawn. The first prize is one million dollars, the second prize is one hundred thousand dollars, and the third prize is ten

thousand dollars. Determine the total number of different ways in which the winners can be drawn. (Assume that the tickets are not replaced after they are drawn.)

Ans_

4.3/13 Question #23There are 12 qualified applicants for 6 trainee positions in a fast-food management program. How many different groups of trainees can be selected? Ans_