KS O /alekscgi/x/Isl.exe/10_u-IgNslkasNW8D8A9PVVf0eU6MG8FFOW-3iCx/LnpPFQGgkjbaDC... @ 6 Quiz 5.A (Sections 7.1, 7.2, 7.3) Question 3 of B (1 point) | Question Attempt: 1 of 1 Time Remaining: 140:15 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 $4700 . 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 $ 8200 7 Round the answer to at least four decimal places. The probability that the sample mean tax is less than $8200 |0.8599 X S Part 2 of 5 (b) What is the probability that the sam een $7600 and $ 7900 7 Round the answer to at least four decima The probability that the sample mean tax is between $ 7600 and $ 7900 = 0.4772 5 Part 3 of 5 (c) Find the 30 percentile of the can. Round the answer to at least two decimal places. The 80 percentile of the sample mean Part 4 of 5 (d) Would E be unusual it the san her to at least four der Unusual eng less than $ 7700 5 01021 Part S of c) Do you think it answer to at least four decimal pia Na 10 5 Continue