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avatar+156 

The ages of dogs at an animal shelter are normally distributed with a mean of 3.9 years and a standard deviation of 1.2 years. 

 

what is the age of a dog at the shelter with a z score of -1.7?

 

1.86 years 

2.98 years

3.23 years

5.43 years

 Apr 10, 2019
 #1
avatar+18049 
+2

A negative z-score is BELOW the mean

3.9 -1.7 x 1.2 =  1.86 yrs

 Apr 10, 2019
 #2
avatar+99580 
+1

Age - 3.9

________    = -1.7          multiply  both sides by 1.2

     1.2

 

Age - 3.9  = -2.04       add .09 to both sides

 

Age  =  1.86

 

 

cool  cool   cool

 Apr 10, 2019

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