Conditional probability is the probability of an event occurring given that another event has already occurred. It quantifies how the likelihood of one event changes when we know that another event is true. Mathematically, the conditional probability of event A given event B is expressed as P(A|B) = P(A ∩ […]
Standard error (SE) measures the accuracy with which a sample represents a population. It quantifies the variability of a sample mean by showing how much it is likely to differ from the true population mean. SE is calculated by dividing the sample’s standard deviation (SD) by the square root of […]
ANOVA, or Analysis of Variance, is a statistical method used to compare the means of three or more groups to determine if there are significant differences between them. It works by analyzing the variance within each group and the variance between the groups. ANOVA tests whether the observed differences among […]
T Test MCQs with Answer: A t-test is a statistical method used to determine whether there is a significant difference between the means of two groups. It’s commonly used when the sample size is small (usually n < 30) and the population variance is unknown. The t-test compares the observed […]
Z Test MCQs: A Z-test is a statistical method used to determine whether there is a significant difference between the means of two groups, typically when the sample size is large (usually n > 30). It compares the sample mean to the population mean or compares two sample means. The […]