Scenario: You are the laboratory manager of a rural, 25 bed hospital with an ave
ID: 713496 • Letter: S
Question
Scenario: You are the laboratory manager of a rural, 25 bed hospital with an average daily census of 21 patients. Based on your market proposal, you were successful in replacing your outdated chemistry analyzer (Analyzer A) with a new model (Analyzer B). Perform the following validation studies based on the following results: 1. Precision Stud Sample # Instrument A 11.6 12.6 15.4 13.0 14.4 11.9 13.0 16.3 15.0 12.6 13.8 12.8 13.2 13.0 12..5 10.9 12.8 11.9 14.0 14.7 12.9 13.4 12.5 13.1 15.5 14.7 12.1 11.6 12.9 13.5 Reference Method 11.8 12.5 15.4 13.8 14.6 12.3 13.0 15.9 15.1 12.5 13.8 12.8 13.1 13.1 12.7 11.0 12.6 11.9 14.2 15.1 12.8 13.4 12.6 13.4 15.4 14.8 12.4 11.5 13.2 13.6 10 12 15 16 18 19 20 21 23 24 25 26 27 28 29 30 Show all work for calculation of the F test. What do the results show you when comparing the new method to the old method? Explain in detailExplanation / Answer
Answer:
ANOVA : Single Factor
SUMMARY
Groups
Count
Sum
Average
Variance
Instrument A
30
397.6
13.25333
1.630851
Reference Method
30
400.3
13.34333
1.559092
ANOVA
Source of Variation
SS
df
MS
F
P-value
F crit
Between Groups
0.1215
1
0.1215
0.076177
0.783528
4.006873
Within Groups
92.50833
58
1.594971
Total
92.62983
59
From above ANOVA table it is seen that p-value = 0.783528 > > 0.05. Hence Instrument A and reference method provides nearly same results. Hence two methods seems to be at par.
ANOVA : Single Factor
SUMMARY
Groups
Count
Sum
Average
Variance
Instrument A
30
397.6
13.25333
1.630851
Reference Method
30
400.3
13.34333
1.559092
ANOVA
Source of Variation
SS
df
MS
F
P-value
F crit
Between Groups
0.1215
1
0.1215
0.076177
0.783528
4.006873
Within Groups
92.50833
58
1.594971
Total
92.62983
59
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