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A sample of 100 widgets from the Acme production line shows that the average lifespan of these parts is 900 hours. The standard deviation of production has been 200 hours historically and is known to be normally distributed.
a) Give a point estimate of lifespan of all production.
b) Form an interval estimate for the students using a 99% confidence interval
c) Interpret the results you obtained in question }p
d) Assuming the sigma of 200 was actually the standard deviation for the sample, recalculate the interval estimate. Discuss how this changed your result from that in part b.
Solve the equations i. 6sinh theta - 4cosh theta-3=0 correct to 3 decimal places
How high does it go before returning to the ground?
A person is given 4 coins each with equal and independent probabilities of being a nickel , a penny, a dime or a quarter. What is the probability the person has been 37 cents
let p(x) = 7- 3(x-4)+5(x-4)^2 - 2(x-4)^3 + 6(x-4)^4 be the fourth degree of polynomial for the function f about 4. Assume f has derivatives of all real orders.
How many servings of fruit should Dale eat on Saturday to average at least 5 servings per day for the week?
A survey of 398 children given at a local elementary school showed that 175 like chocolate ice cream, 225 like pistachio ice cream, and 123 do not like chocolate or pistachio ice cream. How many children like at most one kind of ice cream mentione..
Find the Fourier Transform of f(x) = e^((-x^2)/(2a^2). note: complete the square in the x term in the exponent and make the change of variable; y=x+(*a^2)*i*b.
Please do NOT work this problem. but how would you know in this case whether to approach it from a min/max point? Is there anything other than the obvious "least" keyword?
A rectangular box without a lid is to be made from( 12 m^2 ) of cardboard. Compute the maximum volume of such a box using a method of Lagrange Multipliers.
Summation and proof using mathematical Induction - Provide a careful and complete proof by induction.
A spinner is used for which it is equally probable that the pointer will land on any one of six regions. Three regions are colored red, two are colored green and one is colored yellow
Write a polynomial A(x) that represents the area. Find A(5). Selling shirts. If a vendor charges p dollars each for rugby shirts, then he expects to sell 2000 - 100p shirts at a tournament.
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