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Household weekly spending at Aldi data collected from 20 families in Sydney had the sample mean...

Household weekly spending at Aldi data collected from 20 families in Sydney had the sample mean $160 with a sample standard deviation of $15.

Calculate 90% confidence interval for μ.

Show your workings or provide Excel functions you have used for calculation.

Math   Statistics-And-Probability   
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Answer #1

otherwise you can use CONFIDENCE (alpha, standard_dev, size) function in excel to find the answer

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