Microsoft Word - 2201_Quiz2B.docm

A drug manufacturer states that the mean amount of Naproxen Sodium, the active ingredient in reducing pain, in a tablet is 220 mg. A pharmacist wonders if the mean amount of Naproxen Sodium is different from 220 mg? She randomly selects 17 tablets, measures the amount of Naproxen Sodium in each, and obtains the following information. Use significance 0.01.

Microsoft Word - 2201_Quiz2B.docm

Box plot = All points inside fences.

Normal probability plot =All points inside bounds.

x = 221.24 mg

s = 2.42 mg

1. 4A. What is the appropriate test procedure?
   • z-Test of the mean
   • t-Test of the mean
   • z-Test of the proportion
   • None of these
2. 4B. What is the appropriate set of hypotheses (H0, H1)?
   • =220, 220
   • 220, =220
   • =220, <220
   • =220, >220
3. 4C. What is the correct magnitude of the critical value?
   • 2.583
   • 2.921
   • 2.235
   • 2.120
4. 4D. Whatisthecorrectvalueoftheteststatistic?
   • 2.11
   • +2.11
   • +0.49
   • +8.43
5. 4E. What is the correct P-value for this test statistic?
   • 0.025
   • 0.050
   • 0.020
   • 0.100
   • 4F.Whatisthecorrectconfidenceinterval?
     • (220.0,222.4)
     • (219.2,223.2)
     • (220.2,222.2)
     • (219.5,222.9)
6. 4G. What is the correct conclusion of this hypothesis test?
   • Do not reject the null.
   • Reject the null.
   • Sometimes reject the null.
   • Donotrejectthealternative.
   • 4H.IsthemeanamountofNaproxenSodiumsignificantlydifferentfrom220mg?
     • Yes.
     • No.
     • Sometimes.
     • Dependsondistribution.