# Line Spacing Between Aligned Equations

I've been typing this equations but these equations does not get enough line spacing spacing. I get space sufficient if I did type them separately but I want them aligned too.

following is the code:

\begin{align*}
\chi^2 & = \frac{\sigma_{s}^{2}}{\sigma_{p}^{2}} (n-1)\\
& = \frac{31.11}{20} (10-1) \\
& = 13.999
\end{align*}


preamble if needed to understand what Im doing wrong

\documentclass[a4paper,14pt]{extreport}
\setlength{\parindent}{2em}
\setlength{\parskip}{1em}
\renewcommand{\baselinestretch}{1.0}
\usepackage[a4paper, inner=1.5cm, outer=1.5cm, top=1.0cm,
bottom=1.5cm, bindingoffset=1cm]{geometry}
\usepackage{amsmath,mathpazo}
\setlength{\columnseprule}{1pt}
\usepackage{enumerate}
\usepackage{enumitem}
\usepackage{graphicx}
\usepackage{caption}
\usepackage{hyperref}
\usepackage{amsthm}
\usepackage{csquotes}
\usepackage[T1]{fontenc}
\usepackage{mathptmx}
\usepackage{pifont}
\usepackage{array}
\usepackage{multirow}

• Welcome to TeX.SE! May 26 at 8:29
• Off-topic: Don't load both enumerate and enumitem; choose one or the other, but not both. I'd recommend using enumitem... And there's no point in loading mathpazo if you're going to clobber it later by loading mathptmx.
– Mico
May 26 at 8:51

When working with align* and the multi-row math environments of the amsmath package, a useful paramater to know about is \jot: it governs the default amount of whitespace padding that's inserted between the rows. The default value of \jot is 3pt; you may want to increase its value to 6pt, especially as you're using a fairly large value for the document's basic font size. (The default value of \jot is not increased automatically if a document font size larger than 10pt is used.)

\documentclass[a4paper,14pt]{extreport}

% What's needed to get the sample document to compile:
\usepackage{amsmath,mathptmx}

\begin{document}

\begingroup % Localize scope of the next instruction: