Mathematics, 08.04.2020 00:14, brittanygibson2812

A toy manufacturer wants to know how many new toys children buy each year. Assume a previous study found the variance to be 2.25. He thinks the mean is 7.2 toys per year. What is the minimum sample size required to ensure that the estimate has an error of at most 0.12 at the 95% level of confidence

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A toy manufacturer wants to know how many new toys children buy each year. Assume a previous study f...