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anonymous
 one year ago
Suppose x is a normally distributed random variable with mean = 30 and standard deviation = 8. Find the value of the random variable, call it x(0), such that
a. P(x>=x(0) = .5
b. P(x < x(0) = .025
anonymous
 one year ago
Suppose x is a normally distributed random variable with mean = 30 and standard deviation = 8. Find the value of the random variable, call it x(0), such that a. P(x>=x(0) = .5 b. P(x < x(0) = .025

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amistre64
 one year ago
Best ResponseYou've already chosen the best response.1and what do you have to work with?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1and every stats student should know what the random variable for half of a normal distribution is ...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What do you mean by that? I believe that is all that is provided in the problem

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1i am not taking your course, so I do not know what you have at your disposal to work with .... the information is beside the point.

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1ti83, or tables, or what?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh, I see. The problem and my teacher doesn't specify. I'm not sure what method to use, but I guess by regular and calclulator methods work

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1do you have a stats calculator?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How would I show my work though?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1can you find the distribution menu?

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1well, you show your work by writing down the process you took to get the answer. i used this function and inputed this information, and got these results ...

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1you want what is called: INVNORM

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1we will also prolly want to use the z formula, becuase all the invnorm function does is give us a zscore \[z=\frac{xmean}{sd}\] since we are looking for x, we algebra it into \[x=mean+z(sd)\] given that z is the result of the invnorm function

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1a. P(x>=x(0)) = .5 invnorm(.5), hit enter b. P(x < x(0) = .025 invnorm(.025), hit enter

amistre64
 one year ago
Best ResponseYou've already chosen the best response.1seeing that they give you the mean and sd x = 30 + 8z
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