The average daily volume of a computer stock in 2011 was million​ shares, according to a reliable source. A stock analyst believes that the stock volume in 2014 is different from the 2011 level. Based on a random sample of trading days in​ 2014, he finds the sample mean to be million​ shares, with a standard deviation of s million shares. Test the hypotheses by constructing a ​% confidence interval. Complete parts​ (a) through​ (c) below. ​(a) State the hypotheses for the test. ​: mu equals million shares ​: mu not equals million shares ​(b) Construct a ​% confidence interval about the sample mean of stocks traded in 2014. The lower bound is nothing million shares. The upper bound is nothing million shares. ​(Round to three decimal places as​ needed.) ​(c) Will the researcher reject the null​ hypothesis?

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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answers

rauschg

rauschg · hand

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step-by-step explanation:

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11 -1> 1 -1+ a

-12 > a

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step-by-step explanation:

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