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"The aim of the present study is to estimate some mortalitymeasures such as the age specific death rates (ASDRA), infantmortality rate (IME) and me table crude death rate (CDR) for male,female and both sexes of Bangladesh in 2005. For this purpose, twoabridged life tables, one for male and other for female wereconstructed using the corresponding secondary data on lifeexpectancy at birth of Bangladesh in 2005 taken from Islam (2003).These were compared to the values in 199] and it was observed thatthese rates were showing decreasing trend during 1991-2005.Moreover, a mathematical model was fitted to the number ofpersons surviving at an exact age x (lx) only for male of Bangladeshin 2005. Model validation technique, cross validity predictionpower (C VFP) and F-test, showed that the mathematical model wasvalid and hence, fit is well. Instantaneous force of mortality ( |J. X )only for male of Bangladesh in 2005 was estimated And it wasfound that |.L X exhibited decreasing trend up to age 20-24 andincreasing in the remaining age group but rapidly increasing afterage 50 years to infinity."

"The aim of the present study is to build somemathematical models and then to forecast some fertility parametersin urban area of Bangladesh. For this purpose, the secondary timeseries data on Crude Birth Rate (CBR), Total Fertility Rate (FFR).Gross Reproduction Rate (GRR) and Net Reproduction Rate (NRR)of various issues duly published by Bangladesh Bureau of Statistics(BBS) have been used in the present study. A few mathematical timetrend models have been fitted to time series data of CBR, TFR, GRRand NRR It is _found that the CBR follows quadratic H.e. parabolic)polynomial model while the TPR, GRR and NRR follow simplelinear regression model. Model validation technique .such as Cross-Validity Prediction Power (C VFP), pi, , is applied to these modelsto verify how much these models are valid or not. It was found thatall these models are more than 95%, 79%, 82%, and 72% stablerespectively and their shrinkages are only 0.00739Z 0.032l33.0. 027916, and 0.0424229, respectively. These rates have beenforecasted during 1999-2005 using these time trend models."