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1. A purchaser of electronic components wants to test the hypothesis that they last less than 100 h. To do this she takes a random sample of 16 such components and ?nds that, on average, they last 96 h, with a standard deviation of 8 h. If the purchaser knows that the lifetime of the components is normally distributed, should she accept the hypothesis that they last less than 100 h at
(a) A 95% level of con?dence?
(b) A 99% level of con?dence? 2. In the past, 20% of applicants for admission into a master's program had GRE scores above 650. Of the 88 students applying to be admitted into the program in 1981, 22 had GRE scores above 650. Do the 1981 applicants have greater GRE scores than previous applicants at the 5% level of signi?cance?
A, B started business with 50000,60000, C joined later after x months invested 70000 and B withdraws before x months to end of the year. Then what is the ratio of their profit?
At one place in a text book, the procuct of the page numbers on facing pages is 930. What are the page numbers?
Naiela received a 125-days promissory note for $20,202 which is matured on 7th august 2014 with a simple interest rate of 5.8% per annum. She later discounted the note 66 days before the maturity date and obtained $20,176.48.
You are to solve Problem 30 in Chapter 4 on page 158 of your textbook. It's about publishing three weekly magazines. You can use QM for Windows to perform a sensitivity analysis for Objective function coefficients and the RHS values of the constraint..
a man has a rectangular garden. one length of the garden lies along a patio wall. however the rest of the garden is
Find the number of pitchers that she should produce and the price she should charge in order to maximize profit. Also find the maximum profit.
Two carts A and B are connected by a rope 39 feet long that passes over pulley P. The point Q is on the floor directly beneath P and between the carts. Cart A is being pulled away from Q at a speed of 2 ft/sec.
use dimensional analysis to convert the quantity to the indicated units. If necessary, round the answr to two decimal places. 1) 70 in. to ft.
apply the ideas of questioning the data namely examining the sources of data to evaluate their representativeness and
The questions we will answer using optimization are: What dimensions should the box have, and what would be the resulting maximum volume?
Find an equation of the tangent line to the curve y(x) = (9/(sin(x)cos(x))+(3sin(x)/(sec(x)cos(x)) at the point (1/5 Pi, y(1/5 Pi))
What does the result suggest about the effectiveness of seat belts?
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