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In a belt-and-pulley drive, the belt embraces the shorter pulley 165° and runs over it at a mean speed of 1700 m/min with a standard deviation of 51 m/min.
The density of the belt has a mean value of 1 g/ cm3 and a standard deviation of 0.05 g/cm3. The mean and standard deviations of the permissible stress in the belt are 25 and 2.5 kg/cm2, respectively. The coefficient of friction O) between the belt and the pulley is given by μ = 0.25 and σµ = 0.05.
Assuming a coefficient of variation of 0.02 for the belt dimensions, find the width and thickness of the belt to maximize the mean horsepower transmitted.
The minimum permissible values for the width and the thickness of the belt are 10.0 and 0.5 cm, respectively.
Assume that all the random variables follow normal distribution and the constraints have to be satisfied with a minimum probability of 0.95.
a simple random sample of n 300 full-time employees is selected from a company list containing the names of all n 5000
Perform the following activities using a program such as MS Excel. Keep all calculations within one file. You may use separate worksheets within the same file, though.
Stat 31 Fall 2010 - Homework 1. Statistics and parameters A statistic is a quantity that is calculated from a sample. Give an example of a statistic that estimates an unknown population parameter
Do you favor recycling in your neighborhood
How many free throws must the second player make in a row in order to confidently reject the same null hypothesis? Use the 95% level of confidence for both players.
Why do so many people believe they can think about more than one thing at a time? What effect do fast, multitasking computer systems like Unix have on such beliefs? Is this healthy or unhealthy?
suppose that we have a sample space s e1 e2 e3 e4 e5 e6 e7 where e1 e2 . . . e7 denote the sample points. the
Lakewood Fashions must decide how many lots of assorted ski wear to order for its three stores. Information on pricing, sales. What decision should be made by the conservative?
Much attention has recently focused on the incidence of concussions among athletes. Separate samples of soccer players, non-soccer athletes, and non-athletes were selected.
what graph can i use to display the results of the following scenario preschool students create pictures of their
in a particular occupation a random sample of 210 men found that 65 smoked. in a random sample of 240 women 87 smoke.
car manufacturers advertise gas consumption for new cars. standards require mileage estimates to be within a plus or
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