In a sales effectiveness seminar, a group of sales represenatives tried two approaches to selling a customer an automobile. The aggressive approach and the passive approach. For 1160 customers, the following record was kept:   Sales No sales Row total Aggressive 270 310 580 Passive 416 164 580 Column total 686 474 1160   Suppose a customer is selected at random from the 1160 participating customers. Let us use the following notation for events: a = aggressive approach, pa = passive approach, s = sales, n = no sales. So P(A) is the probability that an aggressive approach was used, and so on. (A)Compute P(S), P(S|A) and P(S|Pa) (B)Are the events S= sale and pa =passive approach independent? explain (C)Compute P(A and S) and P(Pa and S) (D)Compute P(N) and P(N|A) (E)Are the events N=no sale and a = aggressive approach independent? Explain (F)Compute P(A or S)

The following tables show the make-up of students in a school's math club. Male Female | Totals Freshmen 3 Sophomores 6 4 10 Juniors 7 12 Seniors 4 6 10 Totals 20 20 40 P(juniors I male)? 3 20

The following tables show the make-up of students in a school's math club. Male Female Totals Freshmen 3 5 8 Sophomores 4 10 Juniors 7 5 12 Seniors 4 10 Totals 20 20 40 P(female I freshman)? 4 20

Suppose you are the president of the student government. You wish to conduct a survey to determine the student​ body's opinion regarding student services. The administration provides you with a list of the names and phone numbers of thE 731 registered students.   Obtain this sample using the portion of the random number table provided in the problem statement. Start with the first column of the first row and work down each column.   Type the numbers corresponding to the students chosen.   enter your response here ​(Use a comma to separate answers as​ needed.)     random number table 90279,  9589802995,   4831398541,   7094488592,   7953872868,   2655418909,   2433671255,   7867063390,   9301465701,    1124677814,    33522

A manufacturing plant makes computer chips 24 hours a day. Employees work one of three, 8 hour shifts during the morning (2am-10am), day (10am-6pm), and night (6pm-2am). Below are data on the number of defective chips on a randomly chosen 24 hour period. Shift Morning Day Night Number of Defective Chips 23 26 47 Total Chips Manufactured 330 330 330 The plant manager thinks there might be more defective computer chips manufactured during the night shift compared to the day shift. Give appropriate statistical evidence to test the managers' claim.

At an assembly plant, workers assemble parts for a piece of farm equipment. The supervisor conducted an experiment to compare the effectiveness of three assembly methods, A, B, and C. Eighteen employees were randomly assigned, six employees each, to one of the three methods. After completing their training, each person was asked to assemble five pieces of equipment using his or her training method. The average time to complete the assembly of all five pieces of equipment was recorded. (a) What type of study design is used? O independent groups design O repeated measures design O matched pairs design O randomized block design What are the experimental units in this study? O the 18 employees O the five pieces of equipment to be assembled O the three assembly methods O the average time to assemble five pieces of equipment (b) What are the treatments? O the 18 employees O the five pieces of equipment to be assembled O the three assembly methods the average time to assemble five pieces of…

freshmen business students at a local university produced the results listed below. How many students took history and science, but not music? 2525 took history;2222 took science;2323 took music;1919 took history but not science;1010 took science and music;1212 took history and music;44 took all three

A psychologist wanta to determine the effect of relaxing music on a person's reaction to a stressful event. Participants were randomly assigned to one of three groups. A participant was brought into a room with no windows and only one door. In the background, either soft classical music, or no music at all was playing. After a set amount of time, a fire alarm went off, and smoke started to come from under the door. A hidden video camera records the participants behavior that is later scored by the experimenter for level of panic from 0-100. Which statistical test would be best to determine if there is a significant difference between groups?  One sample t test Dependent samples t test Independent t test ANOVA

A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: