Category Statistics

A negative z-score indicates that the raw score is lower than the mean average. For example, if the z score is equal to -3, it means that it is three standard deviations below the mean. can there be a negative…

A positive z-score indicates that the raw score is greater than the mean average. For example, if the z score is equal to 2, it means that it is two standard deviations above the mean. can there be a positive…

Difference between z score and t score The difference between z score and t score is their application in various setups. The Z-score and T-score are commonly used when conducting hypothesis tests or designing confidence intervals, but they differ slightly.…

To calculate confidence interval for a z score, we use the formula; To calculate confidence interval for a z score, we follow the following steps; For example, let’s say the sample size is 64, the sample mean is 5, and…

The z score indicates how many standard deviations a value is from the mean. Notably, if the z score is zero, it indicates that it is on the mean. If the z-score is positive, the raw score is greater than the…

What is the empirical rule? The empirical rule is a numerical rule (also known as the three-sigma rule or the 68-95-99.7 rule) that asserts that almost all data for normality of data will plunge within three standard deviations on either…

Altman’s Z-Score model is a matrix statistic that predicts the likelihood of a company declaring bankruptcy during the next two years. It can be regarded as an indicator of a company’s financial stability by examining the corporate income and multiple balance…

To find the z score using the confidence interval, we need to find the area left of the graph. We use the formula; For instance, in Calculating the Z score for a 95% confidence interval, we have;      …

Z-score in bone density A Z-score is a medical term that links bone density to the normal values for people’s gender and age. A low Z-score (below -2.0) indicates that one has low bone mass (and/or is losing bone at…

Definition of z score A Z-score is a numerical measurement that defines the relationship between a value and the mean of a set of values. The z-score will tell us how far the score deviates from the mean in standard…