Problem 1CRE

Please be aware that some of the following problems may require knowledge of concepts presented in previous chapters.

Weather-Related Deaths Review Exercise 1 involved weather-related deaths. Among the 489 deaths included in the table, 325 are males. Use a 0.05 significance level to test the claim that among those who die in weather-related deaths, the percentage of males is equal to 50%.

Answer:

Step 1 of 1

Given, among the 489 deaths included in the table, 325 are males.

The Hypothesis can be expressed as

H0 :

H1 :

OR

H0 :

H1 :

Use a 0.05 significance level

The Test Statistic can be expressed as

Z =

Z = 7.28

Therefore, the required test statistic is Z = 7.28.

The Critical value corresponding to 0.05 significance level is

Since, the test statistic does not lie in between the z-score (-1.96, 1.96) and conclude that there is sufficient evidence to warrant rejection of the claim that among those who die in weather-related deaths, the percentage of males is equal to 50%.