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{
    "url": "https://numbas.mathcentre.ac.uk/api/questions/11932/?format=api",
    "name": "Is the given function a probability mass function?, , , ",
    "published": true,
    "project": "https://numbas.mathcentre.ac.uk/api/projects/601/?format=api",
    "author": {
        "url": "https://numbas.mathcentre.ac.uk/api/users/697/?format=api",
        "profile": "https://numbas.mathcentre.ac.uk/accounts/profile/697/?format=api",
        "full_name": "Newcastle University Mathematics and Statistics",
        "pk": 697,
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    "edit": "https://numbas.mathcentre.ac.uk/question/11932/is-the-given-function-a-probability-mass-function/?format=api",
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    "source": "https://numbas.mathcentre.ac.uk/question/11932/is-the-given-function-a-probability-mass-function.exam?format=api",
    "metadata": {
        "notes": "<p><strong>25/02/2015:&nbsp;</strong>see the editing history for changes from now on.</p>\n<p><strong></strong></p>\n<p><strong>7/07/2012:</strong></p>\n<p>Added tags.</p>\n<p>Checked answers.</p>\n<p><strong>22/07/2012:</strong></p>\n<p>Added description.</p>\n<p>Ticked stats extension box.</p>\n<p>Issue with the multiple response question.The feedback on choosing only one correct answer out of the two says that both marks are awarded. This needs to be modified to the correct number of marks awarded and also in practice mode should give the information that there are other correct responses.&nbsp;</p>\n<p>Another linked issue is that there should be an option for forcing a number of choices for multiple response.</p>\n<p><strong>31/07/2012:</strong></p>\n<p>Added tags.</p>\n<p><strong>20/12/2012:</strong></p>\n<p>The above issue on multiple response has been resolved. Changed the MR so that lose 2 marks if choose an incorrect response (min mark 0).</p>\n<p>Corrected error in setting up negative values for function, but still claiming that it was a PMF.</p>\n<p>Checked calculation, OK. Added tested1 tag.</p>",
        "licence": "Creative Commons Attribution 4.0 International",
        "description": "<p>Determine if the following describes a probability mass function.</p>\n<p>$P(X=x) = \\frac{ax+b}{c},\\;\\;x \\in S=\\{n_1,\\;n_2,\\;n_3,\\;n_4\\}\\subset \\mathbb{R}$.</p>"
    },
    "status": null,
    "resources": []
}