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5:41 X 6.JPG Define each of these items: a. Conditional probability. b. Event c. Joint probability.
There are 300 welders employed at Maine Shipyards Corporation. A sample of 30 welders revealed that 18 graduated from a registered welding course. Construct the 95percent confidence interval for the proportion of all welders who graduated from a registered welding course. (Round your answers to 2 decimal places.)The confidence interval is between and
To generate leads for new business, Gustin Investment Services offers free financial planning seminars at major hotels in Southwest Florida. Gustin conducts seminars for groups of 25 individuals. Each seminar costs Gustin $3700, and the average first-year commission for each new account opened is $5300. Gustin estimates that for each individual attending the seminar, there is a 0.01 probability that he/she will open a new account.Assume that the number of new accounts you get randomly is:Simulation TrialNew Accounts102030405062728191100111122131142150160170180191200211220231240250Construct a spreadsheet...
A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 440 seconds and a standard deviation of 50 seconds. Find the probability that a randomly selected boy in secondary school will take longer than 499 seconds to run the mile.
(37 marks) Your client is planning to invest some money with your investment company. The client narrows their options down to 2 investment strategies X and Y , and from past experience the annual percentage returns are as follows: X ∼ N(3, 1 2 ) and Y ∼ N(5, 3 2 ). (a) For each investment strategy, calculate the probability of a negative return. [4 marks] (b) For each investment strategy, calculate the probability of return greater than 5.5%.