UsingWW: \tilde x is rendering as \bar x in PGML

Greetings,

Has anyone noticed a rendering problem for LaTeX?

I have "\tilde x" rendering as "\bar x" within PGML.

And it is a slightly shorter bar at that.

Can you recommend a solution so that tilde will render?

The code block is below, Thanks

# DESCRIPTION

# Stat 109 Data summarization

# WeBWorK problem written by TimPayer <tsp1@humboldt.edu>

# ENDDESCRIPTION

## DBsubject(Statistics)

## DBchapter(Exploratory data analysis/descriptive statistics)

## DBsection(Summary statistics)

## Institution(Humboldt State University)

## Author(Tim Payer)

## KEYWORDS(summations, mean, sd)

DOCUMENT();

loadMacros(

"PGstandard.pl",

"PGbasicmacros.pl",

"MathObjects.pl",

"PGML.pl",

"niceTables.pl",

"parserFormulaUpToConstant.pl"

);

Context("Numeric");

install_problem_grader(~~&std_problem_grader);

$showPartialCorrectAnswers = 1;

## The beginning of 2.1 Stat 109 problem:

## Given 10 values (at random) find the mean and median.

$parsum = 0;

@count = ();

foreach my $i (1..12) {

$count [$i] = random(14.8, 16.0,0.1);

$sum = Compute("$count[$i] + $parsum");

$parsum = $sum;

}

# @count = sort{$a <=> $b} @count;

## Code blocks used to sort an array..

#sub num_sort {

# PGsort sub {$_[0] <=> $_[1]}, @_;

# }

#@out_array = num_sort(@count);

#$a = 3;

#do {

# $a = $a + 1;

#} until ( $a == 10 );

## For a randomized sample that gives each student a different random sample,

## un-comment(#) the loop above. For a fixed sample that permit each student to share

## a common answer, comment out the loop above and un-comment the 10

## line of code below.

#$count [1] = 13.1;

#$count [2] = 15.2;

#$count [3] = 14.2;

#$count [4] = 6;

#$count [5] = 9;

#$count [6] = 18;

#$count [7] = 20;

#$count [8] = 23;

#$count [9] = 11;

#$count [10] = 12;

#$count [11] = 12;

#$count [12] = 12;

# Edit answers soon....

$ans1 = Compute("$sum/12 ");

$ans2 = Compute("($count[6] +$count[7])/2 ");

BEGIN_PGML

2.1) Beall et al. 2002, made an extensive survey of hemoglobin levels (g/dL) among male populations living at different elevations. Given that the concentration of oxygen at high elevations ( above 18,000 feet) is less than half that found at sea level, Beall's suspected that men living at higher elevations should have higher hemoglobin levels to compensate for the thinner air. As a base line for comparison, hemoglobin levels from over 1700 men living at sea level in the USA was recorded. A random sample of twelve of these hemoglobin levels are tallied in the table below.

Determine the mean and following five boxplot values to summarize the twelve data points.

Source: Data set drawn from Beall et al. 2002, from the text: "The Analysis of Biological Data", Whitlock and Shluter, 2nd ed. 2015.

[@DataTable(

[

[ ["".PGML::Format('[`\text{Subject}`]')."",

halign => 'r|',

rowcss => 'border-bottom: 2px solid;',

cellcss => 'border-top: 2px solid;

border-left: 2px solid;

border-right: 2px solid; ',],

["".PGML::Format('[`\text{Hemoglobin: g/dL}`]')."",

rowcss => 'border-bottom: 2px solid;',

cellcss => 'border-top: 2px solid;

border-right: 2px solid; ',],

[ ["1",

midrule => '1',