Mathematics, 05.08.2019 20:10 angelalovelis
Atoy manufacturer wants to know how many new toys children can buy each year. he thinks the mean is 6.9 toys per year. assume a previous study found the standard deviation to be 1.3. how large a sample would be required in order to estimate the mean number of toys bought per child at the 98% confidence level with an error at most 0.11 toys?
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![\mu=6.9 \text{ toys per year]](/tpl/images/0171/7961/be08a.png)
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