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Hey there, welcome to numerade.
00:03
So we have a one proportion disease test over here, looking at 86 % of people supporting strict gun laws.
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So with this, we're going to start with part a.
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We have a researcher that thinks that this proportion has decreased.
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So we have our null hypotheses and our alternative hypotheses.
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So for our null hypotheses here, what we have is the proportion, population proportion.
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Let's see here, that supports strict gum laws is 0 .86.
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And our alternative hypotheses is that the proportion is less than 0 .86.
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All right.
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So with this here, we have the proportion.
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So we can find our z score, our test statistic, in which our test statistic here is z equals the 0 .69 minus our population proportion, 0 .86, which is then divided by the square root of 0 .86 times, so 1 minus 0 .86 is 0 .14 divided by our sample size...