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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Atoy manufacturer wants to know how many new toys children can buy each year. he thinks the mean is...