Merge pull request #936 from d-torrance/normal-approx-to-binomial

Increase minimum z-score of normal approx. to binomial dist. problem
openwebwork · Aug 17, 2022 · cb0f03c · cb0f03c
2 parents 5a61ce9 + f0a4e8b
commit cb0f03c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Contrib/Piedmont/StevensStatistics/6-ContinuousProbabilityDistributions/6.5.13.pg b/Contrib/Piedmont/StevensStatistics/6-ContinuousProbabilityDistributions/6.5.13.pg
@@ -34,7 +34,7 @@ $p = 0.48;
 $q = 1 - $p;
 $mu = Compute($n*$p);
 $sigma = Compute(sqrt($n*$p*$q));
-$x = random(round(-3.5*$sigma + $mu), round(-2*$sigma+$mu));
+$x = random(round(-3.4*$sigma + $mu), round(-2*$sigma+$mu));
 
 $z = Compute(($x - $mu)/$sigma)->with(
     tolType => 'absolute',