Please see attached file. I just need to know what the test statistic is and the p-value.
Hypothesis test for the difference of population means: Z test
According to the historical data, the life expectancy in Germany is less than or equal to the life expectancy in the United States. A new study has been made to see whether this has changed. Records of individuals from Germany who died recently are selected at random. The individuals lived an average of years with a standard deviation of years. Records of individuals from the United States who died recently are selected at random and independently. The individuals lived an average of years with a standard deviation of years. Assume that the population standard deviations of the life expectancies can be estimated by the sample standard deviations, since the samples that are used to compute them are quite large. At the level of significance, is there enough evidence to support the claim that the life expectancy, , in Germany is greater than the life expectancy, , in the United States? Perform a one-tailed test.
What is the null hypothesis?
What is the alternate hypothesis?
What is the value of the test statistic?
What is the p-value?