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Essay Question:  4(b). Use the empirical rule to state the percentage of annual sales between 1255 and 9181 (millions of dollars). 

Essay Question:  6(a). What is the probability that the sample contains exactly 3 students who live in the dormitories? 

Essay Question: 2(d). What is the probability that the customer is single given that she is female? 

Essay Question: 1.d. Please indicate categorical or quantitative variables of each of the following three variables: Sales per employee is [variable1]; Sales rank is [variable2]; Number of employees is [variable3].

Essay Question: 2(e). Assume the event F is that a randomly selected customer is female and the event S is that a randomly selected customer is single. Are events F and S independent events? Use probability information to justify your answer. 

Exhibit 1 Michael’s Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below: Number of Laptops Sold Number of Days 0 – 19 5 20 – 39 15 40 – 59 30 60 – 79 20 80 – 99 10 Total 80  

Part II: Problems (Answers are graded on the reasoning used to arrive at an answer, not simply on the answer. Thus, show the reasons and calculation process! If your answer is not an integer, round off results at 4 decimal places.) (89 points total)

Essay Question: 3(b). Compute the mean yearly salary. 

Refer to Exhibit 1. The percentage of days in which the company sold at least 40 laptops is

What type of speciation occurs when gene flow is blocked due to a geographical barrier?