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The purpose of the study is to examine the sleep quality of undergraduates during pre-examination period. In addition, the effect of examination stress and sleep quality on academic performance of the undergraduates is also of interest. Questionnaire is used to collect responses from 379 undergraduates regarding perceived stress and sleep quality on the first week of final examination. Pittsburgh Sleep Quality Index (PSQI) is the instruments used in investigating the perceived sleep quality of respondents one month before the test is taken. Perceived Stress Scale (PSS) is used to measure the perceived stress level of the subjects for the past one month. The data dissemination concludes that the overall sleep quality of the undergraduates is poor. Female undergraduates tend to have a slightly better sleep quality than the male undergraduates. The sleep quality shows a weak positive relationship with perceived stress. It is also discovered that sleep quality and perceived stress have no effect on academic performance. The university authority might need to look into the problem of poor sleep quality among undergraduates especially during pre-examination period.

It has been usually assumed that a sample data is normally distributed when the sample size is at least 30. This is the general rule in using central limit theorem based on the sample size being greater or equal to 30. Many literary works also assumed normality when sample size is at least 30. This study aims to determine the least required sample size that satisfy normality assumption from three non-normal distributions, Poisson, Gamma and Exponential distributions. Computer simulations are carried out to study the least required sample size for the three distributions. Through the study, it is found that sample data from Poisson and Gamma distributions need sample size less than 30, while Exponential needs more than 30 to achieve normality.

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The COVID-19 pandemic has affected the lives of millions across the globe and taken away hundreds of thousands of lives. The spread of COVID-19 due to negligence had caused thousands of confirmed cases in Malaysia. Malaysia Government enforced Movement Control Order as a measure to prevent further outbreak of the disease. This study investigated the current situation of COVID-19 in Malaysia and patients’ demographical connections to the disease. The findings show that COVID-19 attacked males more than females and the elderly of sixty years and above are mostly affected.