
How to Find Z Critical Value in Excel (Left, Right, & 2 Tailed Tests)
This article teaches you to find Z critical value in Excel for left-tailed, right-tailed, and two-tailed tests using the NORM.S.INV function.

Eshrak Kader holds a BSc in Naval Architecture and Marine Engineering from Bangladesh University of Engineering & Technology and an MBA from North South University, building strong analytical and data-driven skills relevant to spreadsheet work. With 4+ years of Excel and Google Sheets experience, he specializes in functions, formulas, charts, statistics, and advanced Excel. He has authored 120+ blogs on Excel, VBA, and data analysis. He enjoys simplifying data and teaching practical spreadsheet skills.
Articles by Eshrak Kader are developed under the guidance of ExcelInsider’s core training program and are technically reviewed by Nehad Ulfat, lead spreadsheet consultant, to ensure accuracy and user-centric value.

This article teaches you to find Z critical value in Excel for left-tailed, right-tailed, and two-tailed tests using the NORM.S.INV function.

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