Calculate the 95% confidence limit. As
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A student performed a titration to determine the exact concentration of NAOH(aq). The titration was performed against a standard 0.1000 M HCI(aq) solution. Phenolphthalein
indicator was used. The following end-point volumes were recorded by the student in units mL:
Trial Number
Volume
1
25.01
2
25.20
3
25.06
4
25.15
5
25.02
Calculate the 95% confidence limit. Assume that there is no outlier. Provide your answer to the correct number of decimal places, without units, and without the + sign. Use the
T-table shown below.
Degrees of freedom
50
90
95
98
99
99.5
99.9
1
1.000
6.314
12.706
31.821
63.657
127.32
636.619
2
0.816
2.920
4.303
6.965
9.925
14.089
31.598
3.
0.765
2.353
3.182
4.541
5.841
7.453
12.924
0.741
2.132
2.776
3.747
4.604
5.598
8.610
5
0.727
2.015
2.571
3.365
4.032
4.773
6.869
2.447
2.365
3.707
0.718
0.711
5.959
5.408
1.943
3.143
4.317
7
1.895
2.998
3.500
4.029
1.860
1.833
8.
0.706
2.306
2.896
3.355
3.832
5.041
9
0.703
2.262
2.821
3.250
3.690
4.781
10
0.700
1.812
2.228
2.764
3.169
3.581
4.587
15
0.691
1.753
2.131
2.602
2.947
3.252
4.073
20
0.687
1.725
2.086
2.528
2.845
3.153
3.850
25
0.684
1.708
2.060
2.485
2.787
3.078
3.725
30
0.683
1.697
2.042
2.457
2.750
3.030
3.646
40
0.681
1.684
2.021
2.423
2.704
2.971
3.551
60
0.679
1.671
2.000
2.390
2.660
2.915
3.460
120
0.677
1.658
1.980
2.358
2.617
2.860
3.373
0.674
1.645
1.960
2.326
2.576
2.807
3.291
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