ChatterBank0 min ago
Probability
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The weight of babies at birth ranges from 3kgs to 10kgs. What is the probability that a woman whose weight is 130kgs will give birth to a baby weighing 2kgs
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3 to 10kgs ( notwithstanding the impossibility ) is a spread around (3+10)/2 kgs
so you have to decide whether 3-10 kg is normally distributed ( yes )
and whether the spread respresents one or two standard deviations
I think two
so the SD is (6.5 minus 3)/2 or 1.75
2kg is within three SD and so the chance is around 0.3% - three in a thousand
this is course work - read your course notes !
3 to 10kgs ( notwithstanding the impossibility ) is a spread around (3+10)/2 kgs
so you have to decide whether 3-10 kg is normally distributed ( yes )
and whether the spread respresents one or two standard deviations
I think two
so the SD is (6.5 minus 3)/2 or 1.75
2kg is within three SD and so the chance is around 0.3% - three in a thousand
this is course work - read your course notes !