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19% Bookmarks Window Help- rl File Edit View History www.awn.connectmath.com McGr Stadents NSu Merew-HCnpus-Summer 2019 9 Part 3 of 5 (c) Find the 40th percentile of the sample mean. Round the answer to at least two decimal places. The 40th percentile of the sample mean is $ Part 4 of 5 (d) Would it be unusual if the sample mean were less than $7700? Round answer to at least four decimal places. It (Choose one) unusual because the probability of the sample mean being less than $7700 is Part 5 of 5 Check Answer Save For Later Submit O 2019 McGrawH Education All Rights Reserved Terms of 3235 6 MacBook Pro F7 F8 # & 2 3 4 6 7 8 9 0 95 19% Window Help History Bookmarks View File Edit www-awn.connectmath.com McGraw-H dacaton Cevpus McGra MoGree-H Cwc-Summer 209-Fim udents NS (d) Would it be unusual if the sample mean were less than $7700? Round answer to at least four decimal places unusual because the probability of the sample mean being less than It (Choose one) $7700 is Part 5 of 5 (e) Do you think it would be unusual for an individual to paye tax of less than $7700? Explain. Assume the variable is normally distributed. Round the answer to at least four decimal places. because the probability that an individual to pays a tax less than $7700 is (Choose one) Check Answer Save For Later Submit A O 2019 McGrawH Education, All Rights Reserved. Terms of Use 3235 6 ... MacBook Pro FS # % A & le 2 3 4 6 7 8 0 CO 5 Edit View History Bookmarks Window Help 19% s T www-awn.connectmath.com NSU McGraw-Hill Camous-Summer 2019 McGraw-Hi Education Campusa McGraw-H Connect Math Pearson Comel 1 2 4 6 9 7 Question 9 of 9 (1 point) Atempt 1 of Unimed View question in a popup 73 Section Exercise 25 (ou 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 $4800. 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 (b) What is the probability that the sample mean tax is between $7400 and $8000? Round the answer to at least four Submit Assignment Save For Later Check Answer Privacy Terms of User 0 2019 McGrew Education All Rights Reserved & $ # 9 7 6 5 4 3 2

Answer 1

Question AnsiNer Mean f8040 ofandavd drviation= 449c0 m1000 fay i le than f8100; ca) Sample Mean BlDo-804O 4800 1o0d 6 b 4000 31.622 6 6 ISI-793 (z< 0.3952) O.6537 P(2< EI00) Sample ( 40 percantile op mean = B040t(-0.253) (400) : 964 0 - (2 IS-84 cs Scanned with CamSc olnet 68 24.16

tars than $77oo i Sample mean is 7706-8040o PCX7700) 4800 VI000 -340 4800 21.622 -34 6 ISI.793 (z<-.239 P Cx<T09) O o126 7100-8046 CXT00) P(z P(2 -240 4P00 P(2-0.070833) it is not unusual poo ba billy be causa > Oaf Scanned with CS CamScanner