A firm wishes to know the average weekly expenditure on food by households to within 2, with
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A firm wishes to know the average weekly expenditure on food by households to within £2, with 95% confidence. If the variance of food expenditure is thought to be about 400, what sample size does the firm need to achieve its aim?
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The sample size needed to achieve the firms aim is 384 This can be calculated using the formul...View the full answer
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Related Book For 
Statistics For Economics Accounting And Business Studies
ISBN: 978027368308
4th Edition
Authors: Michael Barrow
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