Answer:
Step-by-step explanation:
The whole triangle and small triangle are similar (AA). Therefore the sides are in proportion:
<em>cross multiply</em>
<em>use distributive property</em>
<em>subtract 220 from both sides</em>
<em>divide both sides by 55</em>
Answer: (29.35, 40.95)
Step-by-step explanation:
Formula to find the confidence interval for population mean :-
, where = sample mean.
z*= critical z-value
n= sample size.
= Population standard deviation.
As per given , we have
n= 37
Using z-table, the critical z-value for 95% confidence = z* = 1.96
Then, the confidence interval for the population mean will be :
Hence, a 95% confidence interval for the population mean = (29.35, 40.95)