Alzheimers is a progressive disease of the brain. An article published in 2004 was critical of the methodology used in studies of Alzheimers treatments conducted before 2004. In a random sample of n = 27 Alzheimers studies, the quality of the methodology was measured on the Wong scale, with scores ranging from 8 (low quality) to 27 (high quality) for each study. The data is provided below. x=c(20,25,15,18,24,14,25,23,13,23,10,21,21,18,17,23,24,14,18,26,19,18,15,15,16,11,23); (a) Find an 87% confidence interval for the mean quality of studies on the treatment of Alzheimers disease. Assume that the data is normally distributed. ______________ ≤μ≤ _______________ (b) Correctly complete the interpretation of the 87% confidence: A. Based on the sample B. All studies C. For everyone with Alzheimers the mean quality of: A. all Alzheimers studies B. All studies conducted before 2004 C. all patients is somewhere between _________ and ___________on the Wong scale.
Alzheimers is a progressive disease of the brain. An article published in 2004 was critical of the methodology used in studies of Alzheimers treatments conducted before 2004. In a random sample of n = 27 Alzheimers studies, the quality of the methodology was measured on the Wong scale, with scores
x=c(20,25,15,18,24,14,25,23,13,23,10,21,21,18,17,23,24,14,18,26,19,18,15,15,16,11,23);
(a) Find an 87% confidence interval for the
______________ ≤μ≤ _______________
(b) Correctly complete the interpretation of the 87% confidence:
A. Based on the sample
B. All studies
C. For everyone with Alzheimers
the mean quality of:
A. all Alzheimers studies
B. All studies conducted before 2004
C. all patients
is somewhere between _________ and ___________on the Wong scale.
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