Question 1194298
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Hypotheses:
H0: mu = 25,000
H1: mu < 25,000
The claim is in the alternate hypothesis. The inequality sign here tells us we have a left-tailed test.


n = 40 = sample size
xbar = 4421 = sample mean
s = 1349 = sample standard deviation


Compute the z score
z = (xbar - mu)/( s/sqrt(n) )
z = (4421 - 25000)/( 1349/sqrt(40) )
z = -96.4811148533804


We get an extremely small z value
Usually the z scores are between -3 and 3, so we can use a Z table to find the p-value.


I have a feeling there's a typo in one of the numbers given. 
The 4421 seems a bit too small.
Did you mean to say something like 44210 perhaps? 


Please carefully double-check the entire problem and get back to me, or make a new post. 
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