WitCH 134: Low Expectations by martyMarch 7, 20249:25 am4 Comments on WitCH 134: Low ExpectationsWitCH ACARA, NAPLAN, numeracy, probability, WitCH This one is from the calculator part of the 2019 Year 7 test. (Please excuse the wonky reproduction.) Visited 35 times, 1 visit(s) today Related Posts WitCH 124: Blunderbus WitCH 125: Gordian Cutting WitCH 130: Shoo WitCH 128: Door Jam
Interesting. The mathematical definition of expectation is not the rather nebulous everyday understanding. So how could one word a question to test the former? And the final “select” should be “get”. Reply
Thanks, tom. You gotta have something like “on average” in the question. Your point on “get” rather than “select” is a very good one. Reply
As marty pointed out, the word average is missing. I don’t think that Y7 students know about distributions to operate with the expected value terms. Reply
Interesting. The mathematical definition of expectation is not the rather nebulous everyday understanding. So how could one word a question to test the former?
And the final “select” should be “get”.
Thanks, tom. You gotta have something like “on average” in the question. Your point on “get” rather than “select” is a very good one.
I suppose if Alia gets the red ball 20 times she’ll decide the bag is biased.
As marty pointed out, the word average is missing. I don’t think that Y7 students know about distributions to operate with the expected value terms.