Posted by **Misty** on Monday, October 15, 2012 at 11:19pm.

I need to find the critical value of what I have here so far, and I am stuck can someone please help ASAP ?

Percent of children depressed: 4.3%

1250= n

4.3/100= s/1250

53.75= sample mean

n=sample size

After, mid 2010:

Percent of children depressed: 5%

100= n

5/100= s/100

5= sample mean

n= sample size

Null hypothesis: p= 0.043

Alternative hypothesis: p> 0.043

q= 1-p= 1- .05= .95

z= (.05-.043)/ sq rt(.043*.95/1250)

z= 1.224

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