True regarding mortality rate:

(Refer: K. Park’s Textbook of Preventive and Social medicine, 24th  edition, pg no: 63 Standardized mortality ratio Standardized mortality ratio is the ratio of observed deaths by expected number of deaths Standardization is usually done for age > sex in order to compare death rates between the countries Crude death rates are estimated by SRS in India. NFHS have also given data. Only deaths from death certificate data are not the only source.