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1. The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 20%. If 14 calculators are selected at random, what is the probability that less than 3 of the calculators will be defective?
2. An important part of the customer services responsibilities of a cable of company relates to the speed with which trouble in service can be repaired. Historically, the data show that the probability is 0.30 that troubles in a residential services can be repaired on the same day. For the first fifteen troubles reported on a given day, what is the probability that 7 or more troubles will be repaired on the same day?
3. Given the length an athlete throws a hammer is normal random variable with mean 60 feet and standard deviation 4 feet, what is the probability he throws it between 55 feet and 62 feet?
4. If x is a binomial random variable where n=150 and p=0.4, find the probability that X is more than or equal to 55 using the normal approximation to the binomial.
Obtain an output (as in the tutorials).
Select a statistical concept. Here is a general (somewhat broad) listing of concepts covered in the second part of your course: •Estimating a population mean with confidence: discuss confidence interval estimation, the interpretation of the inte..
If A and B are independent events, show the following (a) A and Bc are independent (b) Ac and Bc are independent
Suppose that two students named Gwyneth and Josephine have a total of 20 CDs in their room, consisting of 5 blues CDs and 15 reggae CDs. Each of the students chooses 7 CDs at random (without replacement), with all choices equally likely. (Thus, a..
natural gas spot and future pricesthe law of one price implies that the spot price and the future price of a commodity
Three machines continuously process an unending number of jobs. The time it takes to process a job on machine A is a Uniform [0,4] random variable, the time it takes to process a job on machine B is Uniform [1,3] random variable, and the time it take..
Determine the z score and the area.
The file HotelPrices contains the prices in English pounds
Consider the following: Your friend wishes to know if men at his college are 72 inches tall, on average. He randomly sampled 10 men on his campus, measured their height, and calculated the sample mean to be 69 inches. He concluded that men at his col..
5. A laboratory weights filters from a coal mine to measure the amount of dust in the mine atmosphere. Repeated measurements of the weight of dust on the same filter has a standard deviation of σ = 0.08 milligram (mg) and mean 123 mg.
What percentage of current customers would be eligible for the discount?
problem 1the average prices for a product in twelve stores in a city are shown
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