In Caheina, all petients syrvining a stroke are Supposed to heve their chölestrul levels measured soon after thar str ke and regulanly A sample ot the medical. records thereafter: of men and wimen who...

Extracted text: In Caheina, all petients syrvining a stroke are Supposed to heve their chölestrul levels measured soon after thar str ke and regulanly A sample ot the medical. records thereafter: of men and wimen who hed suftered astroke was examined recoreded proportions of stroke Summvors who had recentiy eholestrol measurement. The following data were obteined Cholestrol level recorded No Yes Sex Female 109 22 Male 97 Perform a x²test of the null hy potheris thet there is no association between an indlividual sex and the chance of he or She having a recently recordded eholestrol measurenent.