How do you calculate a z-score?

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= 60`, SD = 12, and X =58?
• What is the z-score of X, if n = 135, `mu= 70`, SD = 1, and X =75?
• What is the z-score of X, if n = 135, `mu= 74`, SD =3, and X =73?
• What is the z-score of X, if n = 4, `mu= 60`, SD =3, and X =60?
• What is the z-score of X, if n = 3, `mu= 55`, SD =2, and X =56?
• What is the z-score of X, if n = 57, `mu= 35`, SD =5, and X =13?
• What is the z-score of X, if n = 72, `mu= 137`, SD =25, and X =13?
• What is the z-score of X, if n = 204, `mu= 15`, SD =1, and X =35?