ECON7300: Statistical Project Assignment

(A)本文中的问题应由姓氏属于本论文的学生回答
n – z的范围。
(B)使用Excel档案“样本容量70”来回答甲部的问题。
(C)如你对甲部问题的回答并非基于上述理由，则会被处以重罚

(D)关于如何布置作业的资料张贴在黑板上的一个文件夹下

(E)在添加Excel/PHStat输出时，包括所有相关信息。

(即随机性与独立性、正态性与方差齐性)。使用

(1)如果有任何证据表明a的存在，使用大小为70的样本在5%的显著性水平下进行检验

7)学生希望得到。按照所有必要的步骤执行测试

(2)如果你的结果(1)表明它是适当的，使用Tukey-Kramer程序来

(3)如果有任何证据，在5%的显著性水平上使用你的70号样本检验

(即5,6,7)学生期望得到的。按照所有必要的步骤执行

(4)如果你的结果(3)表明它是适当的，使用Tukey-Kramer程序来

Excel / PHStat。如果不合适，解释原因。

Part B: Note: for questions in Part B assume that the three assumptions underlying ANOVA
(i.e. randomness and independence, normality and homogeneity of variance) are met. Use
the closest degrees of freedom for the denominator to get critical value from F-table.
1. What is the level of stress (if any) that cows undergo at different pre-slaughter phases?
To answer this question, a biostatistician randomly selected eight cows from Burdekin,
Townsville, and the heart rate of a cow was measured at four different pre-slaughter
phases: 1) first phase of visual contact with pen mates; (2) initial isolation from pen mates
for prepping; (3) restoration of visual contact with pen mates; and (4) first contact with
human prior to slaughter. The data are as follows.
Cow breed type Pre-slaughter phase
(1) (2) (3) (4)
1 124 124 109 107
2 100 98 98 99
3 103 98 100 106
4 94 91 98 95
5 122 109 114 115
6 103 92 100 106
7 98 80 99 103
8 120 84 107 110
Based on the above information, answer the following questions.
a) At the 5% level of significance, was blocking effective? Follow all the necessary steps
and verify your results using Excel/PHStat.
b) Using a 5% level of significance, is there a significance difference in the mean heart
rate of the four pre-slaughter phases? Follow all the necessary steps to perform the
test.
c) If your results in (b) indicates that it is appropriate, use the Tukey procedure to
determine which groups differ in the mean heart rate. Use 5% level of significance.
Follow all the necessary procedure to perform the test.
ECON7300: Statistical Project Assignment, Semester 2, 2020
2. Do employees’ absentee rates differ across the five days of the workweek (Monday
through Friday)? To answer this question, an econometrician randomly selected nine
weeks and the absentee rate (percentage worker absent) was determined for each day
(Monday to Friday). The data are as follows
Week Absentee rate
Monday Tuesday Wednesday Thursday Friday
1 5.3 0.6 1.9 1.3 1.6
2 12.9 9.4 2.6 0.4 0.5
3 0.8 0.8 5.7 0.4 1.4
4 2.6 0.0 4.5 10.2 4.5
5 23.5 9.6 11.3 13.6 14.1
6 9.1 4.5 7.5 2.1 9.3
7 11.5 4.2 4.1 4.2 4.1
8 9.5 7.1 4.5 9.1 12.9
9 4.8 5.2 10.0 6.9 9.0
Based on the above information, answer the following questions.
a) At the 5% level of significance, was blocking effective? Follow all the necessary steps
and verify your results using Excel/PHStat.
b) Using a 5% level of significance, is there a significance difference in the mean absentee
rate of the five days of the workweek? Follow all the necessary steps to perform the
test.
c) If your results in (b) indicates that it is appropriate, use the Tukey procedure to
determine which groups differ in the mean absentee rate. Use 5% level of significance.
Follow all the necessary procedure to perform the test.

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