SOLUTION: Find the test statistic z using: A claim is made that the proportion of children who play sports is less than 0.5, and the sample statistic include n=1320 subjects with 30% saying

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Question 875281: Find the test statistic z using:
A claim is made that the proportion of children who play sports is less than 0.5, and the sample statistic include n=1320 subjects with 30% saying that they play a sport.
Found 2 solutions by jim_thompson5910, reviewermath:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Test Statistic


z = (phat - p)/(sqrt(p*(1-p)/n))


z = (0.30 - 0.5)/(sqrt(0.5*(1-0.5)/1320))


z = -14.532721699668

Answer by reviewermath(1029) About Me  (Show Source):
You can put this solution on YOUR website!
Q:
Find the test statistic z using:
A claim is made that the proportion of children who play sports is less than 0.5, and the sample statistic include n=1320 subjects with 30% saying that they play a sport.
A:
z = %280.3+-+0.5%29%2Fsqrt%280.5%2A%281+-+0.5%29%2F1320%29 = highlight%28-14.5327%29