, 21.07.2021 08:30 babyskitt

# PLEASE HELP WILL MARK BRAINLIEST You work for a consumer advocate agency and want to find the mean repair cost of a washing machine. As part of your study, you randomly select 40 repair costs and find the mean to be \$120.00. The sample standard deviation is \$17.50. The 99% confidence interval for the population mean repair cost is? A.(112.86, 127.14) B.(114.58, 125.42) C. (115.43, 124.57) D. (111.57, 128.43)

### Another question on Mathematics

Mathematics, 21.06.2019 18:30
Aline of 100 airline passengers is waiting to board a plane. they each hold a ticket to one of the 100 seats on that flight. (for convenience, let's say that the nth passenger in line has a ticket for the seat number n.) unfortunately, the first person in line is crazy, and will ignore the seat number on their ticket, picking a random seat to occupy. all of the other passengers are quite normal, and will go to their proper seat unless it is already occupied. if it is occupied, they will then find a free seat to sit in, at random. what is the probability that the last (100th) person to board the plane will sit in their proper seat (#100)?
Mathematics, 21.06.2019 22:00
Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of \$6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?