Question 1190595
a.
what is the population mean?

 We have population values {{{3}}},{{{8}}},{{{10}}},{{{15}}},  population size {{{N=4 }}}

{{{mu=(3+8+10+15)/4=9}}}


b.
what is the population variance? 

{{{delta^2=(1/4)((3-9)^2+(8-9)^2+(10-9)^2 +(15-9)^2)=18.5+(15-9)^2)=18.5}}}

c.
what is the population standard deviation?

{{{delta= sqrt(delta^2)=sqrt(18.5)}}} ≈{{{4.3012}}}


d. We have population values {{{3}}},{{{8}}},{{{10}}},{{{15}}}, population size {{{N=4}}} and sample size {{{n=2}}}. 

Thus, the number of possible samples which can be drawn without replacement is


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  what is the mean of the sampling distribution of means? 


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​The mean of the sampling distribution of the sample means is equal to the the mean of the population.
  
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