Suppose 223 subjects are treated with a drug that is used to treat pain and 50 of them developed nausea. use a 0.01 significance level to test the claim that more than 20% of users develop nausea.

We reject the null hypothesis.

Step-by-step explanation:

Since we have given that

n = 223

Number of subjects developed nausea = 50

We need to claim that more than 20% of users develop nausea.

So, Hypothesis:

test statistics would be

At 0.10 level of significance, z = 1.28

Since 0.373<1.28 so, test statistic is less than critical value.

Hence, we reject the null hypothesis.