Reference no: EM131061356
1. A new surgical procedure is said to be successful 80% of the time. Suppose the procedure is performed five times and the results are assumed to be independent of one another. What is the probability that a. all procedures are successful? b. exactly four are successful c. less than two are successful
2. An insurance salesman sells policies to 5 men, all of identical age and in good health. if the probability that a man of this particular age will be alive in 30 years is 2/3. Find the probability that in 30 years a. 5 men will be alive b. at least 3 men will be alive; c. only 2 men will be alive d. at least one man will be alive.
3. In a Mathematics examination, the average score was 82 and the standard deviation was 5. All students with scores from 88 to 94 received a grade of B. if the scores are approximately normally distributed and 8 students received a B grade, how many students took the examination?
4. The mean weight of 500 male students at a certain college is 151lbs., and the standard deviation is 15lbs. Assuming that the weights are normally distributed and weights are recorded to the nearest kilogram, find a. how many students weigh less than or equal to 128 lbs.? b. how many students weight more than 185 lbs? c/ How many students weight between 120 and 155lbs.?
5. A used car dealer, has found that the length of time before a major repair is required on the cars it sells is normally distributed with a mean equal to 10 months and a standard deviation equal to 3 months, If the dealer only wants 5% of the cars to fail before the end of the guarantee period, for how many months should the cars be guaranteed?
|
Proportion of married couples
: Can we reject the psychologist's claim that the proportion of married couples for whom her program can prevent divorce is at least 76%?
|
|
Design and draw a ladder diagram circuit
: Design and draw a ladder diagram circuit suitable for a PLC which will fulfill the following control requirement. A momentary push switch is to be recognized, remembered and used to switch on an output for a period of 30 seconds.
|
|
Determine the total pumping cost for the two fluids
: A horizontal heat exchanger has seven steel tubes enclosed in a shell having an ID of 5.0 in. The OD of the tubes is 1.0 in., and the tube wall thickness is 0.10 in. Pure ethyl alcohol flows through the 1.0-in.-OD tubes.
|
|
Find the probability that both adults
: In a sample of 800 U.S. Adults, 214 dine out at a restaurant more than once per week. Two U.S. adults are selected at random from the population of all U.S. adults without replacement. Assuming the sample is representative of all U.S. Adults, com..
|
|
New surgical procedure
: A new surgical procedure is said to be successful 80% of the time. Suppose the procedure is performed five times and the results are assumed to be independent of one another. What is the probability that a. all procedures are successful? b. exact..
|
|
What will be the percentage increase of the radiation
: What will be the percentage increase of the radiation coefficient hr under the changed conditions?
|
|
Consider the plywood as homogeneous and isotropic
: A plywood-manufacturing concern is using a binder that requires a temeprature of 180°F in order to obtain adequate holding strength.
|
|
Explains the basic business communication tips
: Craft a professional email to your supervisor that discusses your progress made so far on requesting information about the country you would select for subcontracting a business
|
|
Average cholesterol of the target population
: A pharmaceutical company wants o test a new cholesterol drug. The average cholesterol of the target population is 200 mg and they have a standard deviation of 25 mg. The company wished to test a sample of people who fall between 1.5 and 3.0 z sco..
|