PHP: stats_variance

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id="function.stats-variance" class="refentry"> <div class="refnamediv"> <h1 class="refname">stats_variance</h1> <p class="verinfo">(PECL stats >= 1.0.0)</p><p class="refpurpose"><span class="refname">stats_variance</span> — <span class="dc-title">Returns the variance</span></p> </div> <div class="refsect1 description" id="refsect1-function.stats-variance-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="methodname"><strong>stats_variance</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.array.php" class="type array">array</a></span> <code class="parameter">$a</code></span>, <span class="methodparam"><span class="type"><a href="language.types.boolean.php" class="type bool">bool</a></span> <code class="parameter">$sample</code><span class="initializer"> = <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong></span></span>): <span class="type"><a href="language.types.float.php" class="type float">float</a></span></div> <p class="para rdfs-comment"> Returns the variance of the values in <code class="parameter">a</code>. </p> </div> <div class="refsect1 parameters" id="refsect1-function.stats-variance-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt><code class="parameter">a</code></dt> <dd> <p class="para"> The array of data to find the standard deviation for. Note that all values of the array will be cast to <span class="type"><a href="language.types.float.php" class="type float">float</a></span>. </p> </dd> <dt><code class="parameter">sample</code></dt> <dd> <p class="para"> Indicates if <code class="parameter">a</code> represents a sample of the population; defaults to <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong>. </p> </dd> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.stats-variance-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the variance on success; <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong> on failure. </p> </div> </div> <div class="contribute"> <h3 class="title">Found A Problem?</h3> <div> </div> <div class="edit-bug"> <a href="https://github.com/php/doc-base/blob/master/README.md" title="This will take you to our contribution guidelines on GitHub" target="_blank" rel="noopener 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href="function.stats-cdf-negative-binomial.php" title="stats_cdf_negative_binomial">stats_cdf_negative_binomial</a> </li> <li class=""> <a href="function.stats-cdf-noncentral-chisquare.php" title="stats_cdf_noncentral_chisquare">stats_cdf_noncentral_chisquare</a> </li> <li class=""> <a href="function.stats-cdf-noncentral-f.php" title="stats_cdf_noncentral_f">stats_cdf_noncentral_f</a> </li> <li class=""> <a href="function.stats-cdf-noncentral-t.php" title="stats_cdf_noncentral_t">stats_cdf_noncentral_t</a> </li> <li class=""> <a href="function.stats-cdf-normal.php" title="stats_cdf_normal">stats_cdf_normal</a> </li> <li class=""> <a href="function.stats-cdf-poisson.php" title="stats_cdf_poisson">stats_cdf_poisson</a> </li> <li class=""> <a href="function.stats-cdf-t.php" title="stats_cdf_t">stats_cdf_t</a> </li> <li class=""> <a href="function.stats-cdf-uniform.php" title="stats_cdf_uniform">stats_cdf_uniform</a> </li> <li class=""> <a href="function.stats-cdf-weibull.php" title="stats_cdf_weibull">stats_cdf_weibull</a> </li> <li class=""> <a href="function.stats-covariance.php" title="stats_covariance">stats_covariance</a> </li> <li class=""> <a href="function.stats-dens-beta.php" title="stats_dens_beta">stats_dens_beta</a> </li> <li class=""> <a href="function.stats-dens-cauchy.php" title="stats_dens_cauchy">stats_dens_cauchy</a> </li> <li class=""> <a href="function.stats-dens-chisquare.php" title="stats_dens_chisquare">stats_dens_chisquare</a> </li> <li class=""> <a href="function.stats-dens-exponential.php" title="stats_dens_exponential">stats_dens_exponential</a> </li> <li class=""> <a href="function.stats-dens-f.php" title="stats_dens_f">stats_dens_f</a> </li> <li class=""> <a href="function.stats-dens-gamma.php" title="stats_dens_gamma">stats_dens_gamma</a> </li> <li class=""> <a href="function.stats-dens-laplace.php" title="stats_dens_laplace">stats_dens_laplace</a> </li> <li class=""> <a href="function.stats-dens-logistic.php" title="stats_dens_logistic">stats_dens_logistic</a> </li> <li class=""> <a href="function.stats-dens-normal.php" title="stats_dens_normal">stats_dens_normal</a> </li> <li class=""> <a href="function.stats-dens-pmf-binomial.php" title="stats_dens_pmf_binomial">stats_dens_pmf_binomial</a> </li> <li class=""> <a href="function.stats-dens-pmf-hypergeometric.php" title="stats_dens_pmf_hypergeometric">stats_dens_pmf_hypergeometric</a> </li> <li class=""> <a href="function.stats-dens-pmf-negative-binomial.php" title="stats_dens_pmf_negative_binomial">stats_dens_pmf_negative_binomial</a> </li> <li class=""> <a href="function.stats-dens-pmf-poisson.php" title="stats_dens_pmf_poisson">stats_dens_pmf_poisson</a> </li> <li class=""> <a href="function.stats-dens-t.php" title="stats_dens_t">stats_dens_t</a> </li> <li class=""> <a href="function.stats-dens-uniform.php" title="stats_dens_uniform">stats_dens_uniform</a> </li> <li class=""> <a href="function.stats-dens-weibull.php" title="stats_dens_weibull">stats_dens_weibull</a> </li> <li class=""> <a href="function.stats-harmonic-mean.php" title="stats_harmonic_mean">stats_harmonic_mean</a> </li> <li class=""> <a href="function.stats-kurtosis.php" title="stats_kurtosis">stats_kurtosis</a> </li> <li class=""> <a href="function.stats-rand-gen-beta.php" title="stats_rand_gen_beta">stats_rand_gen_beta</a> </li> <li class=""> <a href="function.stats-rand-gen-chisquare.php" title="stats_rand_gen_chisquare">stats_rand_gen_chisquare</a> </li> <li class=""> <a href="function.stats-rand-gen-exponential.php" title="stats_rand_gen_exponential">stats_rand_gen_exponential</a> </li> <li class=""> <a href="function.stats-rand-gen-f.php" title="stats_rand_gen_f">stats_rand_gen_f</a> </li> <li class=""> <a href="function.stats-rand-gen-funiform.php" title="stats_rand_gen_funiform">stats_rand_gen_funiform</a> </li> <li class=""> <a href="function.stats-rand-gen-gamma.php" title="stats_rand_gen_gamma">stats_rand_gen_gamma</a> </li> <li class=""> <a href="function.stats-rand-gen-ibinomial.php" title="stats_rand_gen_ibinomial">stats_rand_gen_ibinomial</a> </li> <li class=""> <a href="function.stats-rand-gen-ibinomial-negative.php" title="stats_rand_gen_ibinomial_negative">stats_rand_gen_ibinomial_negative</a> </li> <li class=""> <a href="function.stats-rand-gen-int.php" title="stats_rand_gen_int">stats_rand_gen_int</a> </li> <li class=""> <a href="function.stats-rand-gen-ipoisson.php" title="stats_rand_gen_ipoisson">stats_rand_gen_ipoisson</a> </li> <li class=""> <a href="function.stats-rand-gen-iuniform.php" title="stats_rand_gen_iuniform">stats_rand_gen_iuniform</a> </li> <li class=""> <a href="function.stats-rand-gen-noncentral-chisquare.php" title="stats_rand_gen_noncentral_chisquare">stats_rand_gen_noncentral_chisquare</a> </li> <li class=""> <a href="function.stats-rand-gen-noncentral-f.php" title="stats_rand_gen_noncentral_f">stats_rand_gen_noncentral_f</a> </li> <li class=""> <a href="function.stats-rand-gen-noncentral-t.php" title="stats_rand_gen_noncentral_t">stats_rand_gen_noncentral_t</a> </li> <li class=""> <a href="function.stats-rand-gen-normal.php" title="stats_rand_gen_normal">stats_rand_gen_normal</a> </li> <li class=""> <a href="function.stats-rand-gen-t.php" title="stats_rand_gen_t">stats_rand_gen_t</a> </li> <li class=""> <a href="function.stats-rand-get-seeds.php" title="stats_rand_get_seeds">stats_rand_get_seeds</a> </li> <li class=""> <a href="function.stats-rand-phrase-to-seeds.php" title="stats_rand_phrase_to_seeds">stats_rand_phrase_to_seeds</a> </li> <li class=""> <a href="function.stats-rand-ranf.php" title="stats_rand_ranf">stats_rand_ranf</a> </li> <li class=""> <a href="function.stats-rand-setall.php" title="stats_rand_setall">stats_rand_setall</a> </li> <li class=""> <a href="function.stats-skew.php" title="stats_skew">stats_skew</a> </li> <li class=""> <a href="function.stats-standard-deviation.php" title="stats_standard_deviation">stats_standard_deviation</a> </li> <li class=""> <a href="function.stats-stat-binomial-coef.php" title="stats_stat_binomial_coef">stats_stat_binomial_coef</a> </li> <li class=""> <a href="function.stats-stat-correlation.php" title="stats_stat_correlation">stats_stat_correlation</a> </li> <li class=""> <a href="function.stats-stat-factorial.php" title="stats_stat_factorial">stats_stat_factorial</a> </li> <li class=""> <a href="function.stats-stat-independent-t.php" title="stats_stat_independent_t">stats_stat_independent_t</a> </li> <li class=""> <a href="function.stats-stat-innerproduct.php" title="stats_stat_innerproduct">stats_stat_innerproduct</a> </li> <li class=""> <a href="function.stats-stat-paired-t.php" title="stats_stat_paired_t">stats_stat_paired_t</a> </li> <li class=""> <a href="function.stats-stat-percentile.php" title="stats_stat_percentile">stats_stat_percentile</a> </li> <li class=""> <a href="function.stats-stat-powersum.php" title="stats_stat_powersum">stats_stat_powersum</a> </li> <li class="current"> <a href="function.stats-variance.php" title="stats_variance">stats_variance</a> </li> </ul> </li> </ul> </aside> </div> <footer> <div class="container footer-content"> <div class="row-fluid"> <ul class="footmenu"> <li><a href="/manual/en/copyright.php">Copyright © 2001-2024 The PHP Documentation Group</a></li> <li><a href="/my.php">My PHP.net</a></li> <li><a href="/contact.php">Contact</a></li> <li><a href="/sites.php">Other PHP.net sites</a></li> <li><a href="/privacy.php">Privacy policy</a></li> </ul> </div> </div> </footer> <script src="/cached.php?t=1731172202&f=/js/ext/jquery-3.6.0.min.js"></script> <script src="/cached.php?t=1723177202&f=/js/ext/FuzzySearch.min.js"></script> <script src="/cached.php?t=1707321815&f=/js/ext/mousetrap.min.js"></script> <script src="/cached.php?t=1707321815&f=/js/ext/jquery.scrollTo.min.js"></script> <script src="/cached.php?t=1730558402&f=/js/search.js"></script> <script 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