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Mathematics 27 Online
OpenStudy (anonymous):

4 In order to test the hypothesis that the girls in her class are taller than the boys, Mary measures the heights of the first five girls and five boys listed on the class register. She finds the mean height of the girls is 162cm and the mean height of the boys is 158cm. Is she justified in believing her hypothesis has been confirmed? Justify your answer fully. How would you have designed an investigation to test the hypothesis?

OpenStudy (anonymous):

She can be justified because she did the experiment by using people in her class, boys and girls, and found the mean, or average, height of her classmates.

OpenStudy (anonymous):

No, she has to measure EVERYONE, not just the first 5 for conclusive data.

OpenStudy (anonymous):

This is true...but you can't always use all the people D:

myininaya (myininaya):

Well I would have done the whole population for my statistics but what the teacher did was a random sample of the population which is okay too, but usually the population of a class size is pretty small and the statistics are still easy to do on it.

OpenStudy (anonymous):

Its only ONE class lol its possible to do all of the people in her class

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