Research
Effect of Missingness Mechanism on Household Survey Estimates in Nigeria
In this study, we employed three missingness mechanisms - MCAR, MAR and MNAR to investigate the effects of proportion of Missing data on descriptive and analytic statistics: Mean (Ó®), Variance (ðˆðˆðŸðŸð’šð’š), correlation coefficient (ð†ð†ð’šð’šð’™ð’™ðŸðŸð’™ð’™ðŸðŸ), coefficient of variation (cv), skewness (sk) and Kurtosis (K) which are likely situation a researcher may encounter in the field when dealing with household surveys. This study reveals that sometimes, missing data introduce systematic distortion in survey estimates and bias flows from missing data when the causes of the missing data are linked to the survey statistic measured.
On the Hazard Rate Functions of Hiv/Aids using Weibull and Exponential Models
This paper presents the hazard rate functions of Weibull and Exponential Distributions. Estimates of the hazard rates were obtained using simulated HIV/AIDs data, it was found that for exponential distribution the hazard rate is constant while that of the Weibull distribution increases as the time of infection increases.
