At L&J Corporation, physical characteristics and pH are tested regularly during the production of its most popular shampoo. The pH of 25 samples is provided below. Compute the 99% confidence interval for the pH population mean based on the provided sample.

pH

6.54196875993861

6.44778967407532

6.57591655917699

6.02144402373582

6.74611485019326

6.44759504220914

5.95878893373068

6.07207286529942

6.44276357897965

6.25347931427299

6.04607768773334

6.27924893715302

6.74756640373729

6.50581725503784

6.2974461071461

6.10051822159207

6.35495391188655

6.43642462828197

6.44977646525134

6.40169693733682

6.06301884554327

6.13575113684405

6.60175030143349

6.2166779754078

6.23982916304143