Question

Mummy's curse: King Tut was an ancient Egyptian ruler whose tomb was discovered and opened in 1923. Legend has it that the archaeologists who opened the tomb were subject to a "mummy's curse," which would shorten their life spans. A team of scientists conducted an investigation of the mummy's curse. They reported that the 18 people exposed to the curse had a mean life span of 76.9 years with a standard deviation of 14.6 years, while a sample of 24 Westerners in Egypt at the time who were not exposed to the curse had a mean life span of 71.3 years with a standard deviation of 11.5 years. Assume that the populations are approximately normal. Can you conclude that the mean life span of those exposed to the mummy's curse is greater than the mean of those not exposed? Let 4, denote the mean life span of those exposed to the mummy's curse. Use the a = 0.10 level and the critical value method with the table. Part 1 out of 6 State the appropriate null and alternate hypotheses HO: (select) H : (select This is a (select

Answer 1

We need to test if population 1 mean is significantly greater than population 2 mean. Hence, our hypotheses will be:

Ho: $\mu_1$ < $\mu_2$

H1: $\mu_1$ > $\mu_2$

This is a right tailed (One tailed) test