Mathematics, 08.05.2021 03:20, geminigirl077
Composites are materials that are made by embedding a fiber, such as glass or carbon, inside a matrix, such as a metal or a ceramic. Composites are used in civil engineering structures, and their degradation when subjected to weather conditions is an important issue. In an experiment to investigate the effect of moisture on a certain kind of composite, the weight gains of a collection of 18 samples of composite subjected to water diffusion were obtained. The sample mean was \bar{x}= 0.337\% x - =0.337%, with a sample standard deviation of s = 0.025\%s=0.025%.
(a) Is it safe to conclude from the results of this experiment that the average weight gain for composites of this kind is smaller than 0.36\%0.36%?
(b) Construct a 99\%99% confidence interval that provides an upper bound for the average weight gain for composites of this kind.
Answers: 1
Mathematics, 21.06.2019 18:30, FailingstudentXD
Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.
Answers: 3
Mathematics, 21.06.2019 21:30, kimlyn58p0wyn0
The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?
Answers: 1
Composites are materials that are made by embedding a fiber, such as glass or carbon, inside a matri...
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