An iq test is designed so that the mean is 100 and the standard deviation is 14 for the population of normal adults. find the sample size necessary to estimate the mean iq score of statistics students such that it can be said with 99% confidence that the sample mean is within 3 iq points of the true mean. assume that standard deviation is 14 and determine the required sample size using technology. then determine if this is a reasonable sample size for a real world calculation. what is the required sample size?

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step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204