1.A recent study of a random sample of patients in Shanghai assessed whether Covid-19 survival is related to age. 136 patients under the age of 60 and 85 patients aged 60 or older were included in the study. The number of patients who survived in each group was 130 and 76, respectively.

Assume that the two groups are independent, and that Covid-19 survival rates follow a normal distribution in the population. Use a 0.05 significance level to test the claim that the rate of survival among Covid-19 patients under 60 years is greater than the rate of survival among Covid-19 patients aged 60 or older. What is your decision about the null hypothesis?