The accompanying data is on cube compressive strength (MPa) of concrete specimens. 112.4 97.0 92.7 86.0 102.0 99.3 95.8 103.5 89.0 86.7 A USE SALT (a) Is it plausible that the compressive strength for this type of concrete is normally distributed? O The normal probability plot is not acceptably linear, suggesting that a normal population distribution is not plausible. O The normal probability plot is not acceptably linear, suggesting that a normal population distribution is plausible. O The normal probability plot is acceptably linear, suggesting that a normal population distribution is not plausible. O The normal probability plot is acceptably linear, suggesting that a normal population distribution is plausible. (b) Suppose the concrete will be used for a particular application unless there is strong evidence that true average strength is less than 100 MPa. Should the concrete be used? Carry out a test of appropriate hypotheses. State the appropriate hypotheses. O Hot H= 100 H u> 100 O Hoi H= 100 HH 100 O Hoi H= 100 HH< 100 O Hoi H< 100 HiH = 100 O Hot H> 10 H H- 100 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) t- -1.37 Pvalue- o
The accompanying data is on cube compressive strength (MPa) of concrete specimens. 112.4 97.0 92.7 86.0 102.0 99.3 95.8 103.5 89.0 86.7 A USE SALT (a) Is it plausible that the compressive strength for this type of concrete is normally distributed? O The normal probability plot is not acceptably linear, suggesting that a normal population distribution is not plausible. O The normal probability plot is not acceptably linear, suggesting that a normal population distribution is plausible. O The normal probability plot is acceptably linear, suggesting that a normal population distribution is not plausible. O The normal probability plot is acceptably linear, suggesting that a normal population distribution is plausible. (b) Suppose the concrete will be used for a particular application unless there is strong evidence that true average strength is less than 100 MPa. Should the concrete be used? Carry out a test of appropriate hypotheses. State the appropriate hypotheses. O Hot H= 100 H u> 100 O Hoi H= 100 HH 100 O Hoi H= 100 HH< 100 O Hoi H< 100 HiH = 100 O Hot H> 10 H H- 100 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) t- -1.37 Pvalue- o
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Transcribed Image Text:The accompanying data is on cube compressive strength (MPa) of concrete specimens.
112.4
97.0
92.7
86.0
102.0
99.3
95.8 103.5
89.0
86.7
A USE SALT
(a) Is it plausible that the compressive strength for this type of concrete is normally distributed?
O The normal probability plot is not acceptably linear, suggesting that a normal population distribution is not plausible.
O The normal probability plot is not acceptably linear, suggesting that a normal population distribution is plausible.
O The normal probability plot is acceptably linear, suggesting that a normal population distribution is not plausible.
O The normal probability plot is acceptably linear, suggesting that a normal population distribution is plausible.
(b) Suppose the concrete will be used for a particular application unless there is strong evidence that true average strength is less than 100 MPa. Should the concrete be used? Carry out a test of appropriate hypotheses.
State the appropriate hypotheses.
O Hoi u= 100
Hai u> 100
Ο H μ-100
Hai u* 100
Ο H, μ 100
Hai u« 100
Ο H5, μ < 100
Hai u= 100
Ο H μ 100
Hai u = 100
Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.)
t = |-1.37
P-value = 0
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