Sand is packed into bags which are then weighed on scales. It is known that if full bags of sand are intended to weigh u kg. then the weight recorded by the scales will be normally distributed with a mean u kg and a standard deviation of 0.36 kg How many times would a full sack have to be weighed so that the estimate of the weight would be within 0.2 kg of the true weight with 99.5% confidence? Select one O a The correct answer is not listed Ob. 56 Oc 26 Od 85 Oe 45

MATLAB: An Introduction with Applications
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Sand is packed into bags which are then weighed on scales. It is known that if full bags of sand are intended to weigh u kg. then the weight
recorded by the scales will be normally distributed with a meanu kg and a standard deviation of 0.36 kg.
How many times would a full sack have to be weighed so that the estimate of the weight would be within 0.2 kg of the true weight
with 99.5% confidence?
Select one
O a The correct answer is not listed
b. 56
Oc 26
Od.85
O e. 45
Transcribed Image Text:Sand is packed into bags which are then weighed on scales. It is known that if full bags of sand are intended to weigh u kg. then the weight recorded by the scales will be normally distributed with a meanu kg and a standard deviation of 0.36 kg. How many times would a full sack have to be weighed so that the estimate of the weight would be within 0.2 kg of the true weight with 99.5% confidence? Select one O a The correct answer is not listed b. 56 Oc 26 Od.85 O e. 45
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