week 3 problems
Week three Problems—30 factors 10 factors per drawback. Put solutions within the desk: 1. RD = .366-.175 = .175 RR= .Zero/msohtmlclip1/01/clip_image002.gif"> =.Zero/msohtmlclip1/01/clip_image004.gif"> = 2.09 OR =.Zero/msohtmlclip1/01/clip_image006.gif">= .Zero/msohtmlclip1/01/clip_image008.gif"> = 2.73 Higher Restrict of CI – 1.61 Decrease Restrict of CI – Zero.41 Based mostly om the Confidence Interval values which of the next are true? Reply: D – One might be 95% assured that the true worth might be higher than each the higher and decrease limits 2. three. 1. A medical trial is carried out evaluating a brand new ache remedy for arthritis. Members are randomly assigned to obtain the brand new remedy or a placebo. The end result is ache aid inside 30 minutes. The information are proven under. Ache Reduction No Ache Reduction New Medicine 44 76 Placebo 21 99 Estimate the chance distinction in ache aid between therapies .Zero/msohtmlclip1/01/clip_image010.gif">= Estimate the relative threat in ache aid between therapies .Zero/msohtmlclip1/01/clip_image012.gif">= Estimate the chances ratio in ache aid between therapies .Zero/msohtmlclip1/01/clip_image014.gif">= The higher and decrease limits of the .Zero/msohtmlclip1/01/clip_image014.gif">are proven under Decrease Restrict of CI: ____0.41____ Higher Restrict of CI: ___1.61_____ Based mostly on the Confidence Interval values which of the next are true? A. One might be 95% assured that the true worth might be higher than the higher restrict. B. One might be 95% assured that the true worth might be higher than the decrease restrict. C. One might be 95% assured that the true worth will between the higher and decrease restrict. D. a and b 2.The next knowledge have been collected in a medical trial evaluating a brand new compound designed to enhance wound therapeutic in trauma sufferers. The brand new compound is in contrast towards a placebo. After therapy for five days with the brand new compound or placebo the extent of wound therapeutic is measured and the information are proven under. % Wound Therapeutic Therapy Zero-25% 26-50% 51-75% 76-100% New Compound (n=125) 15 37 32 41 Placebo (n=125) 36 45 34 10 Is there a distinction within the extent of wound therapeutic by therapy? (Trace: Are therapy and the p.c wound therapeutic impartial?) Run the applicable check at a 5% stage of significance. df= ________ alpha= ________ Reject H0if?2> ________ Compute anticipated frequencies Anticipated Frequency = (Row Whole * Column Whole)/N. Full the anticipated frequencies for every cell. % Wound Therapeutic Whole Therapy Zero-25% 26-50% 51-75% 76-100% New Compound 15 ( ) 37 ( ) 32 ( ) 41 ( ) 125 Placebo 36 ( ) 45 ( ) 34 ( ) 10 ( ) 125 Whole 51 82 66 51 250 Compute ?2. ?2= ________ Based mostly on evaluating the computed ?2to the rejection stage ?2which of the next is (are) true? A. We've got statistically important proof at alpha=Zero.05 to point out that H0 is false. B. Therapy and p.c wound therapeutic will not be impartial. C. Therapy and p.c wound therapeutic are impartial. D. a and b. three. A medical trial is carried out evaluating a brand new ache reliever for arthritis to a placebo. Members are randomly assigned to obtain the brand new therapy or a placebo and the end result is ache aid inside 30 minutes. The information are proven under. Ache Reduction No Ache Reduction New Medicine 44 76 Placebo 21 99 Is there a big distinction within the proportions of sufferers reporting ache aid? Run the check at a 5% stage of significance. Reject H0 if Z < ________ or if Z >________ alpha= ________ .Zero/msohtmlclip1/01/clip_image016.gif"> .Zero/msohtmlclip1/01/clip_image018.jpg"> =________ .Zero/msohtmlclip1/01/clip_image020.jpg"> =________ .Zero/msohtmlclip1/01/clip_image022.jpg"> = ________ Z =________ Based mostly on evaluating the computed zto the rejection stage zwhich of the next is (are) true? A. We've got statistically important proof at alpha=Zero.05 to point out that H0 is false. B. We've got statistically important proof at alpha=Zero.05 to point out thatthere a big distinction within the proportions of sufferers reporting ache aid. C. We don't have statistically important proof at alpha=Zero.05 to showthere a important distinction within the proportions of sufferers reporting ache aid. D. a and b