a company claims that the standard deviation

Moodle X A Question 2 Not yet answered Marked out of 1.00 P Flag question 2) The National Institute of Diabetes and Digestive and Kidney Diseases reports that the average cost of bariatric (weight loss) surgery is about $ 22,500 with a standard deviation of $3015. You think this information is incorrect, You randomly select 30 bariatric surgery patients and find that the average cost for their surgeries is $21,545. Is there enough evidence to support your claim at a = 0.04? A BI - IUX> A BI - IUX><