Statistics word problem(s) help??

label Statistics
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Compute the corresponding z-value for the following situation:

1.A newspaper claims that 52% of voters will vote for a particular candidate in an upcoming election. A random survey of 1000 voters shows that 48% will vote for that candidate, with a standard deviation of 3%.

1.A claim is made that the mean of a data set will be 500. In a test of the claim,the mean among 80 trials is actual 512, with a standard deviation of 20. What is the z-value of the given data, rounded to the nearest hundredth?

May 22nd, 2015

1. z=(.48-.52)/.03/sqrt(1000)=-42.16

2. z=(512-500)/20/sqrt(80) = 5.37

May 22nd, 2015

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May 22nd, 2015
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May 22nd, 2015
Jun 27th, 2017
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