Arrivals at telephone booth are considered to be Poisson with an average time of 10 minutes between are arrival and the next. The length of phone call is assumed to be distributed exponentially with mean 3 minutes
Given λ= 1/10 = _____ __________ _______ ____ ___ _____ _____ ___ __________ _____ _____ ________.
_______.
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The lifespan (in ‘000 hours) of four LED bulbs of 07 watts are as follows: 40,46,48, 50
(i) Write all samples of size 2without replacement from the above observations.Compute the sampling distribution and find mean and standard error of the distribution.
(ii) Write all samples of size 3 without replacement from the above observations. Compute the sampling distribution and find mean and standard error of the distribution.
(iii) Compare means and standard errors and draw the conclusion.
If X is a continuous random variable then
If X1, X2, X3, X4 and X5 is a random sample of size 5 taken from anExponential distribution, then estimator T1 is more efficient than T2.
Two cards are drawn one at a time from a 52-card standard deck. Then the probability that the second card is red, if the drawing is done with replacement is 1/2
In a certain book, there is one misprint per two pages, on the average. What is the probability that there are two or more misprints on a randomly chosen page?
The production department for a company requires 3600 kg of raw material for manufacturing a particular item per year. It has been estimated that the cost of placing an order is Rs 36 and the cost of carrying inventory is 25 percent of the investment in the inventories. The price is Rs10 per kg. The purchase manager wishes to determine an ordering policy for raw material
If the coefficient of determination is 0.833, the number of observations and independent variables are 12 and 3, respectively, then Adjusted R2 will be 0.84.