Excel Tutorials
Finding Z Score in Excel
In statistics, a z-score is a standard score that indicates how many standard deviations a data point is from the mean. For instance, a z value of -2 means that…
Statistics Articles
Blog
Read simple statistics guides, worked examples, formulas, and explanations designed to help you understand the concepts behind common calculations.
Showing articles 21–25
25 articles
Basic statistics
How to Determine Sample Size: Cochran, Slovin & Yamane
When conducting quantitative research and intend to collect primary data using survey questionnaires, you'll be required to determine the minimum sample size for your study. Sample size determination helps ensure…
Hypothesis Testing
Finding Z Critical Value
A z-critical value is a cutoff point on a standard normal distribution (z-distribution) used in hypothesis testing to determine whether the results are statistically significant or not. The value is…
Probability & Distribution
Understanding the Binomial Distribution
The binomial distribution is a discrete probability distribution commonly used to model situations where an experiment is repeated a fixed number of times and each trial has only two possible…
Statistical Tables
Z Score Table | Standard Normal Table
A Z Score Table, also called a Standard Normal Table, shows the probability of a value occurring below a specific z-score in a standard normal distribution. It helps you find…