please show all work and explain!! thank you

The analysis of a random sample of 500 households in a suburb of a large city indicates that a 98% confidence interval for the mean family income is ($41,800, $58,680). What is the point estimate used to create this interval? Previous Next In the case of face masks protecting against COVID-19, the null hypothesis would be that face masks do not help prevent the spread of COVID-19. Suppose the CDC goes to test this hypothesis. Which of the following is a Type I error in this situation? o The CDC determines that face masks don't help prevent the spread of COVID-19, but the truth is that face masks do prevent the spread. o The CDC determines that face masks don't help prevent the spread of COVID-19, and the truth is that face masks do not prevent the spread. o The CDC determines that face masks do help prevent the spread of COVID-19, and the truth is that face masks do prevent the spread. o The CDC determines that face masks do help prevent the spread of COVID-19, but the truth is that face masks do not prevent the spread