How do you calculate a z-score? Statistics Inference with the z and t Distributions One-sample z test 1 Answer Nallasivam V Nov 1, 2015 z=(x-barx)/sigmaz=x−¯xσ Explanation: z=(x-barx)/sigmaz=x−¯xσ Where - zz is standard normal variate xx is an observation barx¯x is mean Answer link Related questions What does a z-test measure? What type(s) of distributions can a z-test be applied to? What is the z-score of X, if n = 25, mu= 60μ=60, SD = 12, and X =58? What is the z-score of X, if n = 135, mu= 70μ=70, SD = 1, and X =75? What is the z-score of X, if n = 135, mu= 74μ=74, SD =3, and X =73? What is the z-score of X, if n = 4, mu= 60μ=60, SD =3, and X =60? What is the z-score of X, if n = 3, mu= 55μ=55, SD =2, and X =56? What is the z-score of X, if n = 57, mu= 35μ=35, SD =5, and X =13? What is the z-score of X, if n = 72, mu= 137μ=137, SD =25, and X =13? What is the z-score of X, if n = 204, mu= 15μ=15, SD =1, and X =35? See all questions in One-sample z test Impact of this question 5705 views around the world You can reuse this answer Creative Commons License