Onducted to estimate the mean amount spent

Reference no: EM13259491

A study was conducted to estimate the mean amount spent on birthday gifts for a typical family having two children. A sample of 145 was taken, and the mean amount spent was $187.75. Assuming a standard deviation equal to $39.83, find the 90% confidence interval for m, the mean for all such families.

Reference no: EM13259491

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