Greetings Webwork Forum!
Am I wrong to include possible Popup answers in an if-else condition?
I am not clear on the meaning of the error message response of:
The correct choice must be one of the PopUp menu items at line 2 of (eval 6952)
Died within Value::Error called at line 100 of [PG]/macros/parserPopUp.pl from within parser::PopUp::new called at line 2 of (eval 6952) from within main::PopUp called at line 67 of (eval 6714)
Does this mean that the if-else conditions were not met that there would be no assignment of an answer for PopUp3 ? Or is there an advisement against using PopUp answers within if-else conditions?
Thanks for any guidance you can share with me,
Tim
Here is the code block:
# DESCRIPTION Probability calculation.
# Use correct notation and sample space
# to find the answer from two, and then three random draws.
# WeBWorK problem written by TimPayer <tsp1@humboldt.edu>
# ENDDESCRIPTION
## DBsubject(Probability)
## DBchapter(Random variables)
## DBsection(Expectation)
## Institution(Humboldt State University)
## Author(Tim Payer)
## KEYWORDS(probability, translate, notation)
DOCUMENT();
loadMacros(
"PGstandard.pl",
"PGunion.pl",
"MathObjects.pl",
"parserPopUp.pl",
"PGML.pl",
"PGcourse.pl",
);
#Text(beginproblem()); #uncomment
install_problem_grader(~~&std_problem_grader);
$showPartialCorrectAnswers = 1;
Context("Numeric");
# create three arrays of the same length "in parallel"
# Using "hashes" we have 30 word triplets coordinating the names of
# singular, plural forms for a given bird with its flock name.
$bird = list_random('goose', 'crow', 'starling', 'penguin','quail','hawk','finch','parrot', 'woodpecker', 'dove','lark', 'swallow', 'sparrow', 'stork','peacock', 'owl', 'jay', 'chicken', 'turtledove', 'turkey', 'magpie', 'raven', 'nightingale', 'snipe', 'heron', 'mallard', 'duck', 'pheasant', 'coot', 'plover');
%birds = (goose=>'geese', crow=>'crows', starling=>'starlings', penguin=>'penguins', quail=>'quails',hawk=>'hawks',finch=>'finches',parrot=>'parrots', woodpecker=>'woodpeckers', dove=>'doves', lark=>'larks',swallow=>'swallows', sparrow=>'sparrows', stork=>'storks', peacock=>'peacocks', owl=>'owls', jay=>'jays', chicken=>'chickens', turtledove=>'turtledoves', turkey=>'turkeys', magpie=>'magpies', raven=>'ravens', nightingale=>'nightingales', snipe=>'snipes', heron=>'herons' , mallard=>'mallards', duck=>'ducks', pheasant=>'pheasants', coot=>'coots', plover=>'plovers' );
%flock= (goose=>'gaggle', crow=>'murder', starling=>'murmuration', penguin=>'colony', quail=>'bevy',hawk=>'cast',finch=>'charm', parrot=>'company',woodpecker=>'descent', dove=>'dole', lark=>'exaltation', swallow=>'flight', sparrow=>'host', stork=>'muster', peacock=>'ostentation', owl=>'parliament', jay=>'party', chicken=>'peep', turtledove=>'pitying', turkey=>'rafter', magpie=>'tidings', raven=>'unkindness', nightingale=>'watch', snipe=>'wisp', heron=>'siege', mallard=>'sord', duck=>'raft', pheasant=>'nye', coot=>'cover', plover=>'congregation');
$event = list_random('more than one', 'at least one', 'at most one', 'not every');
#@bird = ('goose','crow','starling'); ##This format needs Version 11 or better.
#@birds = ('geese','crows','starlings');
#@flock = ('gaggle','murder','murmuring');
#$i = random(0, 2, 1); # choose an array index at random
$popup1 = PopUp(
["probability notation", "P(V = 0)", "P(V = 1)", "P(V = 2)", "P(V > 0)", "P(V > 1)","P(V < 2)",], "P(V = 2)");
$popup2 = PopUp(
["probability notation", "P(V = 0)", "P(V = 1)", "P(V = 2)", "P(V > 0)", "P(V > 1)","P(V < 2)",], "P(V > 0)");
$popup4 = PopUp(
["draws?", "one", "two", "three",], "two");
$popup5 = PopUp(
["draws?", "one", "two", "three",], "three");
$v = random(9,49,1);
$ans1 =Compute("$v*$v/100");
$ans2 = Compute("(2*$v-$v*$v)/100");
if($event == "more than one"){
$ans3 =$v**2*(3-2*$v);
$popup3 = PopUp( ["probability notation", "P(V = 0)", "P(V = 1)", "P(V = 2)", "P(V = 3)","P(V > 0)", "P(V > 1)","P(V < 2)","P(V < 3)"], "P(V > 1)");
} elsif ($event == "at least one") {
$ans3=1-(1-$v)**3;
$popup3 = PopUp(["probability notation", "P(V = 0)", "P(V = 1)", "P(V = 2)", "P(V = 3)","P(V > 0)", "P(V > 1)","P(V < 2)","P(V < 3)"], "P(V > 0)");
} elsif ($event == "at most one") {
$ans3=(1+2*$v)*(1-$v)**2;
$popup3 = PopUp(["probability notation", "P(V = 0)", "P(V = 1)", "P(V = 2)", "P(V = 3)","P(V > 0)", "P(V > 1)","P(V < 2)","P(V < 3)"], "P(V < 2)");
} elsif ($event == "not every") {
$ans3=1-$v**3;
$popup3 = PopUp(["probability notation", "P(V = 0)", "P(V = 1)", "P(V = 2)", "P(V = 3)","P(V > 0)", "P(V > 1)","P(V < 2)","P(V < 3)"], "P(V < 3)");
}
# problems with if-then for 1c depending on Popups
BEGIN_PGML
1. The specific name for a flock of [@$birds{$bird}@] is described as a "[@$flock{$bird}@]" of [@$birds{$bird}@].
Consider the case where [$v]% of a [@$flock{$bird}@] of [@$birds{$bird}@] carry a bird flu virus. If two [@$birds{$bird}@] are drawn at random from the [@$flock{$bird}@], find the following probabilities but first complete the following event variable declaration:
Let V = The number of [@$birds{$bird}@] with the bird flu virus taken from [___]{$popup4} random draw(s) from the [@$flock{$bird}@].
1a.) What is the probability of randomly drawing two [@$birds{$bird}@] from the [@$flock{$bird}@] that both have the bird flu virus? Choose the correct probability notation below and then calculate its associated probability with fourth decimal accuracy.
[___]{$popup1} = [______]{$ans1}
1b.) What is the probability of randomly drawing two [@$birds{$bird}@] such that at least one [$bird] has the bird flu virus? Choose the correct probability notation below and then calculate its associated probability with fourth decimal accuracy.
Hint: Let N = the event of a [$bird] not having the bird flu virus. Then construct a sample space of all the possible combinations of V and N.
[___]{$popup2} = [______]{$ans2}
1c.) Consider the case where three [@$birds{$bird}@] are drawn at random from the [@$flock{$bird}@]. What is the probability that [$event] [$bird] has the bird flu virus? First complete the declaration of the event variable below:
Let V = The number of [@$birds{$bird}@] with the bird flu virus taken from [___]{$popup5} random draw(s) from the [@$flock{$bird}@].
Choose the correct probability notation below and then calculate its associated probability with fourth decimal accuracy. Hint: Let N = the event of a [$bird] not having the bird flu virus. Then construct a sample space of all the possible combinations of V and N.
[___]{$popup3} = [______]{$ans3}
END_PGML
BEGIN_PGML_SOLUTION
The correct answers are coming....:
END_PGML_SOLUTION
ENDDOCUMENT();