As a quality control manager, you have been measuring the pressure level provided by a newly installed pump which are purchased from new manufacturer. The mean pressure maintained by the old pump was 150.00 kPa. The manufacturer of the new pump claims that the pressure will be improved after installing the new pump. You have been tasked to ensure that the new pump is better. DATA 96.17 128.32 169.54 167.06 108.02 125.95 152.66 106.58 156.05 134.51 108.77 129.19 93.88 139.16 119.73 176.95 175.1 131.27 182.63 123.95 116.56 91.28 133.55 117.12 217.31 147.25 104.32 159.96 99.02 104.7 124.9 131.31 98.18 66.54 172.01 46.32 140.98 158.39

As a quality control manager, you have been measuring the pressure level provided by a newly installed pump which are purchased from new manufacturer. The mean pressure maintained by the old pump was 150.00 kPa. The manufacturer of the new pump claims that the pressure will be improved after installing the new pump. You have been tasked to ensure that the new pump is better. DATA 96.17 128.32 169.54 167.06 108.02 125.95 152.66 106.58 156.05 134.51 108.77 129.19 93.88 139.16 119.73 176.95 175.1 131.27 182.63 123.95 116.56 91.28 133.55 117.12 217.31 147.25 104.32 159.96 99.02 104.7 124.9 131.31 98.18 66.54 172.01 46.32 140.98 158.39

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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Concept explainers

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.

Question

H0 : =150.00 kPa

H1 :>150.00 kPa

b) α= 0.01;

sample variance : 1300 freq. table

sample deviation : 36.0555 freq. table

D) CREATE HYPOTHESIS TESTING
SAMPLE MEAN FROM (Frequency table)
POPULATION MEAN: given
SIGNIFICANCE LEVEL: 0.01
SAMPLE STANDARD DEVIATION (Frequency table)
TEST VALUE
Confidence interval 90%
This data has no outliers
(Explain)

As a quality control manager, you have been measuring the pressure level provided by a newly
installed
dund
which are purchased from new manufacturer. The mean pressure maintained by the
old pump was 150.00 kPa. The manufacturer of the new pump claims that the pressure will be
improved after installing the new pump. You have been tasked to ensure that the new pump is
better.
DATA
96.17
128.32
169.54
167.06
108.02
125.95
152.66
106.58
156.05
134.51
108.77
129.19
93.88
139.16
119.73
176.95
175.1
131.27
182.63
123.95
116.56
91.28
133.55
117.12
217.31
147.25
104.32
159.96
99.02
104.7
124.9
131.31
98.18
66.54
172.01
46.32
140.98
158.39
cumula Relative
Mid point (X m) =
freque tive
interval boundary ncy (f) frequen
Class
Class
frequency
f x Xm
lower + upper
су
Ef
2
46+70
46-70
45.5-70.5
= 0. 04
50
= 58
2 x 58 = 116
2
4
71-95
70.5-95.5
= 0. 08
50
83
332
12
96-120
95.5-120.5 12
18
= 0. 24
50
108
1296
15
121-145
120.5-145.5 15
33
= 0. 30
50
133
1995
9
146-170
= 0. 18
50
158
1422
145.5-170.5 9
42
5
171-195
170.5-195.5 5
47
= 0. 10
50
183
915
196-220
195.5-220.5 3
50
3
0.06
208
624
50
II

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