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According to a study, it takes an average of 330 minutes for taxpayers to prepare, copy, and
electronically file an income tax return. The distribution of times follows the normal distribution, and
the standard deviation is 80 minutes. A random sample of 40 taxpayers is picked. a) What is the
standard error of the mean in this example? b) What is the likelihood the sample mean is greater
than 320 minutes? c) What is the likelihood the sample mean is

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According to a study it takes an average of 330 minutes for.pdf

  • 1. According to a study, it takes an average of 330 minutes for taxpayers to prepare, copy, and electronically file an income tax return. The distribution of times follows the normal distribution, and the standard deviation is 80 minutes. A random sample of 40 taxpayers is picked. a) What is the standard error of the mean in this example? b) What is the likelihood the sample mean is greater than 320 minutes? c) What is the likelihood the sample mean is