scholarly journals A confidence interval approach to investigating non-response bias and monitoring response to postal questionnaires.

1991 ◽  
Vol 45 (1) ◽  
pp. 81-85 ◽  
Author(s):  
A Tennant ◽  
E M Badley
Keyword(s):  
Confidence Interval ◽  
Response Bias ◽  
Interval Approach ◽  
Monitoring Response

scholarly journals Confidence interval approach for evaluating bias in laboratory methods

1988 ◽  
Vol 10 (3) ◽  
pp. 144-146 ◽  
Author(s):  
K. F. Yee
Keyword(s):  
Confidence Interval ◽  
Statistical Tests ◽  
Laboratory Methods ◽  
Mean Values ◽  
Practical Concern ◽  
Alternative Approach ◽  
Interval Approach ◽  
Significant Difference ◽  
The Mean

A statistically significant difference in mean values between two laboratory quantitation methods is interpreted as a bias. Sometimes such a difference is so minute that it does not constitute any practical concern. An alternative approach is to test statistically whether the two methods are close enough, not for equality. This is to look at the confidence interval of the mean method difference and does not entail any additional statistical tests.

scholarly journals Confidence interval approach to feature re-weighting

2008 ◽  
Vol 40 (3) ◽  
pp. 385-407 ◽  
Author(s):  
Robert S. Lee ◽  
Chin-Wan Chung ◽  
Seok-Lyong Lee ◽  
Sang-Hee Kim
Keyword(s):  
Confidence Interval ◽  
Interval Approach

scholarly journals THE MEDIATING EFFECTS OF AWARENESS ON THE RELATIONSHIP BETWEEN PROCUREMENT MANUAL COMPLIANCE’S BARRIERS AND COST PERFORMANCE OF CONSTRUCTION PROJECTS

2018 ◽  
Vol 16 ◽  
Author(s):  
Abdullahi Nafiu Zadawa ◽  
Abdul Aziz Hussin ◽  
Atasya Osmadi
Keyword(s):  
Confidence Interval ◽  
Mediation Analysis ◽  
Indirect Effects ◽  
Construction Projects ◽  
Public Procurement ◽  
Mediating Effects ◽  
Cost Performance ◽  
Interval Approach ◽  
The Relationship ◽  
Cost Aspect

Public Procurement Manual (PPM) are the procedural guidelines for executing public procurement practices including construction procurement. Compliance with PPM among construction procurement parties has been facing serious challenges which affects the performance of construction projects especially cost aspect. This study identified fraudulent practices as the major procurement manual compliances’ barriers affecting cost performance of construction projects. The paper examines the mediating effects of awareness on procurement manual compliance’s barriers affecting cost performance. Data was collected from the procurement entities of nine selected Nigerian federal universities. A mediation analysis was performed via bias-corrected bootstrapped confidence interval approach using Process Macro package. The indirect effects obtained was positive and different from zero, and the confidence interval within which the effect occur do not include zero indicating that awareness can mitigate the effects of fraudulent practices been compliance barriers affecting cost performance of construction projects.

scholarly journals Use of Rasch Analysis to Evaluate and Refine the Community Balance and Mobility Scale for Use in Ambulatory Community-Dwelling Adults Following Stroke

2016 ◽  
Vol 96 (10) ◽  
pp. 1648-1657 ◽  
Author(s):  
Kimberly J. Miller ◽  
Courtney L. Pollock ◽  
Brenda Brouwer ◽  
S. Jayne Garland
Keyword(s):  
Confidence Interval ◽  
Item Response ◽  
Response Bias ◽  
Repeated Measures ◽  
Rasch Analysis ◽  
Task Demands ◽  
Community Dwelling ◽  
Clinical Population ◽  
Sensitivity To Change ◽  
Walking Balance

AbstractBackgroundThe Community Balance and Mobility Scale (CB&M) is increasingly used to evaluate walking balance following stroke.ObjectiveThis study applied Rasch analysis to evaluate and refine the CB&M for use in ambulatory community-dwelling adults following stroke.MethodsThe CB&M content was linked to task demands and motor skill classifications. Rasch analysis was used to evaluate internal construct validity (structural validity) and refine the CB&M for use with ambulatory community-dwelling adults following stroke. The CB&M data were collected at 3 time points: at discharge from inpatient rehabilitation and at 6 and 12 months postdischarge (N=238). Rasch analysis evaluated scale dimensionality, item and person fit, item response bias, scoring hierarchy, and targeting. Disordered scoring hierarchy was resolved by collapsing scoring categories. Highly correlated and “misfitting” items were removed. Sensitivity to change was evaluated with standardized response means (SRMs) and one-way repeated-measures analysis of variance.ResultsThe CB&M was primarily linked to closed body transport task demands. Significant item-trait interaction, disordered scoring hierarchies, and multidimensionality were found. Scoring categories were collapsed in 15/19 items, and 5 misfitting items were removed. The resulting stroke-specific 14-item unidimensional CB&M (CB&MStroke) fit Rasch model expectations, with no item response bias, acceptable targeting (13% floor effects and 0% ceiling effects), and moderate-to-strong sensitivity to change at 6 months postdischarge (SRM=0.63; 95% confidence interval=−1.523, −0.142) and 12 months postdischarge (SRM=0.73; 95% confidence interval=−2.318, −0.760).LimitationsFindings are limited to a modest-sized sample of individuals with mild-to-moderate balance impairment following stroke.ConclusionsThe CB&MStroke shows promise as a clinical scale for measuring change in walking balance in ambulatory community-dwelling adults poststroke. Future studies are recommended in a larger sample to validate and further refine the scale for use in this clinical population.

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