please help find average and standard deviation

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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please help find average and standard deviation

Trial
#
1
2
3
PART III.7
Mass of Urea
(g)
where,
5.965
5.764
Standard deviation hint
5.934
The average or mean, is defined by:
• each ₂ is the value of the data point.
n is the number of trials.
90% confidence limit
Moles of Urea
(mol)
0.0993239
0.0959627
0.0988077
18
S =
Average enthalpy of reaction for the dissolution of urea in J/mol.
Standard deviation of your measured values of the enthalpy of
reaction for the dissolution of Urea (J/mol)
qrxn
(J)
2459.59
1267.92
1182.22
Σαΐ
n
Σ (x₁ - x)²
n - 1
Unrounded
24763.5
Unrounded
13212.6
11964.8
The standard deviation, s, measures how close values are clustered about the mean. The standard deviation for small
samples is defined by:
3
3
AHrxn
3
(J/mol)
P
Rounded
2.476 ×104
1.321 ×104
1.196 ×104
Rounded
3
3
3
Transcribed Image Text:Trial # 1 2 3 PART III.7 Mass of Urea (g) where, 5.965 5.764 Standard deviation hint 5.934 The average or mean, is defined by: • each ₂ is the value of the data point. n is the number of trials. 90% confidence limit Moles of Urea (mol) 0.0993239 0.0959627 0.0988077 18 S = Average enthalpy of reaction for the dissolution of urea in J/mol. Standard deviation of your measured values of the enthalpy of reaction for the dissolution of Urea (J/mol) qrxn (J) 2459.59 1267.92 1182.22 Σαΐ n Σ (x₁ - x)² n - 1 Unrounded 24763.5 Unrounded 13212.6 11964.8 The standard deviation, s, measures how close values are clustered about the mean. The standard deviation for small samples is defined by: 3 3 AHrxn 3 (J/mol) P Rounded 2.476 ×104 1.321 ×104 1.196 ×104 Rounded 3 3 3
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