Question

suppose in an industrial experiment an engineer is interested in how the mean absorption of moisture in concrete varies among 3 different concrete aggregates. The samples are exposed to moisture for 48 hours. it is decided that 6 samples are to be tested for each aggregate, requiring a total of 18 samples to be tested. the data are recorded in the following table. Results of one-way ANOVA show that at least two of the samples are significantly different (F(2,15)=10.96; p-value=0.001165). Perform pairwise comparisons using Tukey's procedure at level significance of 0.05. please hand or typed calculations.

data1 | data2 | data3 |

595 | 639 | 417 |

580 | 615 | 449 |

508 | 511 | 517 |

583 | 573 | 438 |

633 | 648 | 415 |

517 | 677 | 555 |

Answer #1

Table 2. The
mean response times per block for each participant that was
tested.
2f
2g
2i
2j
2e
/3
Blocks
average of
average of
average of
/6
/6
/6
/6
Participants
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
8 & 10
11 & 13
14 & 16
Difference score
t-value
p (1-tailed)
p (2-tailed)
1
749
703
776
502
745
875
811
688
833
745
557
1136
658
529
794...

Your firm works in construction and buys ASTM A325M8S bolts in
very large numbers. You are interested in purchasing bolts from
different suppliers and have obtained and tested samples of 200
bolts from three suppliers: Allnutt, Boltzman, Coachers.You have
tested these in your new bolt testing machine, purchased after you
had discovered your old bolt testing machine was performing
erratically. (For the purposes of this question, you are safe to
assume that the new machine works perfectly and that its...

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