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by: Theresia Dare

11

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2

Theresia Dare
Drexel
GPA 3.77

Staff

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COURSE
PROF.
Staff
TYPE
Class Notes
PAGES
2
WORDS
KARMA
25 ?

## Popular in Course

This 2 page Class Notes was uploaded by Theresia Dare on Wednesday September 23, 2015. The Class Notes belongs to STAT202 at Drexel University taught by Staff in Fall. Since its upload, it has received 11 views. For similar materials see /class/212424/stat202-drexel-university in Business at Drexel University.

## Similar to STAT202 at Drexel

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Date Created: 09/23/15
Stat 202 Iztest practice problems Textproblems 1317 1319 1321 1335 1338 Very brief solutions Problem H0 H1 always Test DF and decision Conclusion says that H0 is Stat rule not true Value 1317 Prob Of 730 2 Reject H0 conclude that gifts selecting any gift reject if gt 5991 are not equally attractive 13 1319 Prob That 1380 4 Reject H0 conclude that absence occurs reject if gt 13277 absences not equally distributed on any specific through the week day is 02 1321 Dist Is Poisson 092 3 no parameters Fail to reject H0 conclude that with l 15 estimated data could have come from reject ifgt 7815 Poisson dist 1321 H0 Favorite magazine is independent of type of car owned Here s Minitab s analysis on this Tabulated statistics Type Mag Using frequencies in Freq Rows Import Cell Contents Type Columns Mag CampD MT 19 22 2670 1719 22192 13468 4630 2981 12795 07765 73 47 7300 4700 Count Expect RampT 23 2011 04140 32 3489 02387 55 5500 ed count All 64 6400 111 11100 175 17500 Contribution to Chiesquare H1 They re dependent Pearson ChiSquare 6275 DF 2 P7Value 0043 You should to obtain the Izstat value of 6275 manually The values below each observed frequency are the expected frequency for the cell and the cell s contribution to the total Izstat The critical value with 2 DF is 5991 so the decision rule is to reject H0 is the test stat gt 5991 Since 6275 gt 5991 we d reject H0 and conclude that there is a relation between the type of car driven and the favorite magazine You can t determine the exact p value from our table but you should be able to determine that it is between 0025 and 005 1338 Test H0 Recommended action is independent of inspector H1 It s not independent Here s Minitab s analysis Tabulated statistics Action Inspector Using frequencies in Freqi Rows Action Columns Inspector A B C All Major 20 14 13 47 1692 1598 1410 4700 05607 02453 00858 Minor 18 16 23 57 2052 1938 1710 5700 03095 05895 20357 Scrap 1 2 46 1656 1564 1380 4600 00189 18369 16696 All 54 51 45 150 5400 5100 4500 15000 Cell Contents Count Expected count Contribution to Chiisquare Pearson ChiSquare 7352 DF 4 P7Value 0118 Again you should be able to manually obtain the numerical results with the exception of the p value you should be able to determine from our table that it is larger than 010 The critical value is 779 reject H0 iftest stat gt 779 Since 7352 lt 779 we do not reject H0 We conclude that the recommended action is not related to the inspector used

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