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anonymous
 one year ago
Finding Probability Using a Normal Distribution
The weights of newborn baby boys born at a local hospital are believed to have a normal distribution with a mean weight of 3537 grams and a variance of 285,156. If a newborn baby boy born at the local hospital is randomly selected, find the probability that the weight will be less than 4172 grams. Round your answer to four decimal places.
anonymous
 one year ago
Finding Probability Using a Normal Distribution The weights of newborn baby boys born at a local hospital are believed to have a normal distribution with a mean weight of 3537 grams and a variance of 285,156. If a newborn baby boy born at the local hospital is randomly selected, find the probability that the weight will be less than 4172 grams. Round your answer to four decimal places.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Been a while since I took stat, but I think this is a zscore problem

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes it is i need help desperately

Lyrae
 one year ago
Best ResponseYou've already chosen the best response.1Fundamental probability theory states: \[P_{\chi}(\chi \le x) = F_{\chi}(x)\]In this question \(\chi\) is distributed as a normal distribution with \(\mu = 3537\) and \(\sigma^2 = 285,156\). \(F_{\chi}(x)\) is the cumulative distribution function of \(\chi\), i.e. normalcdf.

Lyrae
 one year ago
Best ResponseYou've already chosen the best response.1Use a statistical calculator, Excel, wolfram alpha, etc. and use the cumulative distribution function for normal distribution (normalcdf) with given values for parameters x, \(\mu\) \(\sigma\).

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I dont understand what u just said at all

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I dont understand what u just said at all

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How do i find the standard deviation?

Lyrae
 one year ago
Best ResponseYou've already chosen the best response.1Use this: http://www.danielsoper.com/statcalc3/calc.aspx?id=53 Mean = \(\mu\) = 3537 Standard deviation = \(\sqrt{variance}\) = \(\sqrt{\sigma^2}\) = \(\sigma\) = \(\sqrt{285,156}\) x = 4172

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Im sorry i still dont understand. I dont get that calculator. There isnt a a place for me to put the variance in

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0or is the variance the standard deviation?

Lyrae
 one year ago
Best ResponseYou've already chosen the best response.1standard deviation = \(\sqrt{variance}\)
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