Question

In: Statistics and Probability

For a sample of 400 individuals who filed a tax return between April 10 and 15,...

For a sample of 400 individuals who filed a tax return between April 10 and 15, the sample mean refund was $930. Based on prior experience a population standard deviation of $1600 may be assumed. What is the
p-value (to 4 decimals)?

d. Using = 0.05, what is the critical value for the test statistic?

Solutions

Expert Solution

Let denotes the true average refund for individuals who filed a tax return between April 10 and 15.

orchestra answered 2 years ago
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