Hey guys this is a completed assighnment with the answers ne

Hey guys this is a completed assighnment with the answers next to them, can someone please just show a step by step on how they answered them!! thanks!! :)

Solution

1.

We first get the z score for the critical value. As z = (x - u) sqrt(n) / s, then as          
          
x = critical value =    19.68      
u = mean =    18.87      
n = sample size =    29      
s = standard deviation =    3.22      
          
Thus,          
          
z = (x - u) * sqrt(n) / s =    1.35      
          
Thus, using a table/technology, the right tailed area of this is          
          
P(z >   1.35   ) =    0.088507991 [ANSWER]

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