Answer Happy

Taxes: The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard deviation is $4600. The IRS plans to draw a sample of 1000 tax returns to study the effect of a new tax law. Part 1 of 5 (a) What is the probability that the sample mean tax is less than $8100? Round the answer to at least four decimal places. The probability that the sample mean tax is less than $8100 is Part 2 of 5 S (b) What is the probability that the sample mean tax is between $7500 and $8100? Round the answer to at least four decimal places. The probability that the sample mean tax is between $7500 and $8100 is X S Espai

(c) Find the 70th percentile of the sample mean. Round the answer to at least two decimal places. The 70th percentile of the sample mean is $ Part 4 of 5 (d) Would it be unusual if the sample mean were less than $7800? Round answer to at least four decimal places. It (Choose one) ▼ unusual because the probability of the sample mean being less than $7800 is X

(d) Would it be unusual if the sample mean were less than $7800? Round answer to at least four decimal places. It (Choose one) ▼ unusual because the probability of the sample mean being less than $7800 is Part 5 of 5 (e) Do you think it would be unusual for an individual to pay a tax of less than $7800? Explain. Assume the variable is normally distributed. Round the answer to at least four decimal places. (Choose one) ▼ because the probability that an individual to pays a tax less than $7800 is Yes No X Ś Espa