Answer: a) 0.6141
b) 0.9772
Step-by-step explanation:
Given : Mean : 
Standard deviation : 
The formula for z -score :

a) Sample size = 1
For x= 63 in. ,

The p-value = 

Thus, the probability is approximately = 0.6141
b) Sample size = 47
For x= 63 ,

The p-value = 

Thus , the probability that they have a mean height less than 63 in =0.9772.
Yes it is because if you multiply 3*3=9
then what you do on top you do on the bottom 10*3=30
<em>Your Answer: </em>A.) (2 , 5) <u>I also provided the steps.</u>
Hope this helps y'all :)