A statistician chooses 30 randomly selected dates, and when examining the occupancy records of a particular motel for those dates, finds a mean number of rooms rented to be 122.43 with a standard deviation of 22.598 rooms rented. If the number of rooms rented is normally distributed, find the 99% confidence interval for the population variance of the number of rooms rented.

1. Procedure: Select an answer One mean Z procedure One mean T procedure One proportion Z procedure One variance χ² procedure
2. Assumptions: (select everything that applies)
   • Population standard deviation is known
   • Population standard deviation is unknown
   • The number of positive and negative responses are both greater than 10
   • Normal population
   • Simple random sample
   • Sample size is greater than 30
3. Unknown parameter: Select an answer μ, population mean σ², population variance p, population proportion