A researcher wants to know if a new antihypertensive drug reduces systolic BP more than placebo. She randomizes 30 patients (15 per group). Mean BP reduction in drug group = 12 mmHg (SD 4); placebo group = 5 mmHg (SD 5). Test at α = 0.05. Solution from Ibrahim:
No doctor can ever be 100% certain. Biostatistics by Muhammad Ibrahim treats probability not as a gamble, but as a tool for informed decision-making. He covers: biostatistics by muhammad ibrahim
by Muhammad Ibrahim is a textbook designed primarily for undergraduate and postgraduate students in medicine, pharmacy, dentistry, nursing, and biology . It bridges the gap between theoretical statistics and real-world biological data analysis. The book emphasizes applied reasoning over mathematical derivation, focusing on how to choose, perform, and interpret statistical tests in clinical and laboratory settings. A researcher wants to know if a new