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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.
Find the area of the "triangular" region in the first quadrant bounded on the left by the y-axis and on the right by the curves y
Show that these topologies are the same and What is the resulting space and identify the familiar quotient space given by this relation and then show precisely that the quotient topology on this space is the same as the usual one.
Review Chi Square analysis & create an example of how you would use the tool to help make a business decision.
Write and solve a system of equations to represent the cost y of x fish and an aquarium at each store. b. Solve this system using substitution or elimination.
A manufacturer of lightning fixtures has a daily production costs of C(x)=800-10x+0.25x^2 where C is the total cost (in dollars) and x is the number of units produced.How many fixtures should be produced each day to yield a minimum cost?
Consider the following elements of the vector space P3 of all polynomials of degree less than or equal to 3. p(x)= x-1, q(x)=x+x2, r(x)= 1+x2-x3
If the teachers receive an average salary increase of $1096, write out the first 6 terms of the sequence formed by the average salaries starting with the 1999-2000 school year. Explain how you got your answer.
Fixed costs are estimated to be $8,400 for 2005. How many units should the company sell to break even ?
Calculation of a Laplace Transform from first principles
The normal body temperature measured by placing the thermometer under the tongue is assumed to be normally distributed with a standard deviation of 0.7oC. Body temperatures of 52 subjects were recorded and the average is 36.83oC.
Probability in poker, Find the probability of drawing a straight flush in poker
A motel cleark counts his 1 dollar bills and his 10 dollar bills at the end of a day. He finds that he has a total of 64 bills, having a combined monetary value of $190. Find the number of bills of each denomination that he has.
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