Question: How do I calculate the z test statistic using StatCrunch Some experts believe that 19% of all freshwater fish in a country have such high

How do I calculate the z test statistic using StatCrunch

Some experts believe that 19% of all freshwater fish in a country have such high levels of mercury that they are dangerous to eat. Suppose a fish market has 250 fishtested, and 43 of them have dangerous levels of mercury. Test the hypothesis that this sample is not from a population with 19% dangerousfish, assuming that this is a random sample. Use a significance level of 0.05.

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