Eighteen subtracted from half a number is 38. Find the number.
1 answer:
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Finding the p-value of the test using the z-distribution, as we are working with a proportion, it is found that this was a significant difference for levels of significance of 0.02 and lower.
<h3>What are the hypothesis test?</h3>At the null hypothesis, we test if the proportion is of 50.3%, hence:
We have a two-tailed test, hence at the alternative hypothesis we test if the proportion is different, that is:
The test statistic is given by:
In which:
is the sample proportion.
- p is the proportion tested at the null hypothesis.
- n is the sample size.
In this problem, the parameters are:
Hence:
Considering a two-tailed test, using a z-distribution calculator, the p-value is of 0.0203. Hence this was a significant difference for levels of significance of 0.02 and lower.
More can be learned about the z-distribution at brainly.com/question/26454209