Intro to Effective Communication for Statisticians
Module 1: Intro to Effective Communication for Statisticians
Hypothesis Test of μ1 vs. μ2 H0: μ1 = μ2 vs. HA: μ1 > μ2 • • • • • •
Verified assumptions of normality and homogeneity of variances No outliers in the data set Mean 1 = 0.7928, Std. Dev. 1 = 0.0530 Mean 2 = 0.9988, Std. Dev. 2 = 0.0533 The p-value is < 0.0001 Reject H0
(c) 2012 by the American Statistical Association
2
Study Objectives & Design • Objective: To demonstrate that tensile strength of our NextGen product is greater than tensile strength of our Current product. • Sampling: – 30 randomly selected Current samples collected over one-year period from multiple production lines
– 30 randomly selected samples from our NextGen product over two-month period from multiple production lines
• Test Method: – SFTE (Society for Testing Everything) Method 102.5-73 requires that the test result for each of the 30 samples is reported as the average of 5 tensile pulls. The data is reported in lbs/in.
(c) 2012 by the American Statistical Association
3
Data & Results Boxplot of Current, Next Gen 1.1
Data
1.0
Mean = 0.7928 lbs./in.
0.9
Mean = 0.9988 lbs./in.
0.8
0.7 Current
Next Gen
The tensile strength for the NextGen product is significantly greater than the Current product (p
Hypothesis Test of μ1 vs. μ2 H0: μ1 = μ2 vs. HA: μ1 > μ2 • • • • • •
Verified assumptions of normality and homogeneity of variances No outliers in the data set Mean 1 = 0.7928, Std. Dev. 1 = 0.0530 Mean 2 = 0.9988, Std. Dev. 2 = 0.0533 The p-value is < 0.0001 Reject H0
(c) 2012 by the American Statistical Association
2
Study Objectives & Design • Objective: To demonstrate that tensile strength of our NextGen product is greater than tensile strength of our Current product. • Sampling: – 30 randomly selected Current samples collected over one-year period from multiple production lines
– 30 randomly selected samples from our NextGen product over two-month period from multiple production lines
• Test Method: – SFTE (Society for Testing Everything) Method 102.5-73 requires that the test result for each of the 30 samples is reported as the average of 5 tensile pulls. The data is reported in lbs/in.
(c) 2012 by the American Statistical Association
3
Data & Results Boxplot of Current, Next Gen 1.1
Data
1.0
Mean = 0.7928 lbs./in.
0.9
Mean = 0.9988 lbs./in.
0.8
0.7 Current
Next Gen
The tensile strength for the NextGen product is significantly greater than the Current product (p
