Suppose we want to merely determine whether or not subsequent blood pressure mea
ID: 2926342 • Letter: S
Question
Suppose we want to merely determine whether or not subsequent blood pressure measurements where higher or lower than one another. One approach would be to use the Sign Test. Assume Ho: mean1 = mean2.
Refer to the Sign Test tab in the assignment spreadsheet and Table 7.1
SIGN TEST TAB
Participant
Diastolic_1_Grp2
Diastolic_2_Grp2
1
90
107
17
+
2
106
108
2
+
3
109
100
-9
-
4
108
99
-9
-
5
95
100
5
+
6
94
103
9
+
7
102
106
4
+
8
94
108
14
+
9
106
107
1
+
10
93
99
6
+
11
92
100
8
+
12
103
98
-5
-
13
99
101
2
+
14
106
100
-6
-
15
109
107
-2
-
16
110
108
-2
-
17
97
106
9
+
18
105
98
-7
-
19
105
104
-1
-
20
110
107
-3
-
21
105
108
3
+
22
92
106
14
+
23
91
98
7
+
24
110
101
-9
-
25
99
103
4
+
26
107
98
-9
-
27
94
103
9
+
Positive=>
16
Negative=>
11
TABLE 7.1
N
level of significance for a one-tailed test
0.1
0.05
0.025
0.01
0.005
0.001
0.0005
level of significance for a two-tailed test
0.2
0.1
0.05
0.02
0.01
0.002
0.001
4
0
5
0
0
6
0
0
0
7
1
0
0
8
1
1
0
0
0
9
2
1
1
0
0
10
2
1
1
0
0
0
11
2
2
1
1
0
0
0
12
3
2
2
1
1
0
0
13
3
3
2
1
1
0
0
14
4
3
2
2
1
1
0
15
4
3
3
2
2
1
1
16
4
4
3
2
2
1
1
17
5
4
4
3
2
1
1
18
5
5
4
3
3
2
1
19
6
5
4
4
3
2
2
20
6
5
5
4
3
2
2
21
7
6
5
4
4
3
2
22
7
6
5
5
4
3
3
23
7
7
6
5
4
3
3
24
8
7
6
5
5
4
3
25
8
7
7
6
5
4
4
26
9
8
7
6
6
4
4
27
9
8
7
7
6
5
4
28
10
9
8
7
6
5
5
29
10
9
8
7
7
5
5
30
10
10
9
8
7
6
5
1.True/False. Column G = Column E (Diastolic_1_Grp2) – Column F(Diastolic_2_Grp2). _TRUE__ 1 pt
2.True/False. More patients experienced a rise in blood pressure between the first and second readings. _TRUE_ 1pt
3.True/False. Since 16>11, we can say that Diastolic_1_Grp2 and Diastolic_2_Grp2 differ from one another statistically. _TRUE_1 pt
4.True/False. One of the weaknesses of the sign test approach is that it treats Participants 1 and 9 both as positives, even though the increase in pressures were not the same. _FALSE_1 pt
5.For alpha of 0.05 two sided Test the Critical Value = __1.96___1 pts
6.True/False. By using a two tailed test, we attempt to show the mean of Diastolic_1_Grp2 is smaller than the mean of Diastolic_2_Grp2. _TRUE__1 pt
7.Comparing the smaller of the Positive and Negative values to the critical value which of the following is true? 4 pts
A.There is statistically significant evidence at alpha=0.05 to show that Diastolic_1_Grp2 and Diastolic_2_Grp2 differ from one another.
B.There is not statistically significant evidence at alpha=0.05 to show that Diastolic_1_Grp2 and Diastolic_2_Grp2 differ from one another.
C.There are not enough data points to reach a conclusion.
D.The tied value makes the analysis suspect.
Answer:__B____
Can you help with insuring I have the correct answers for my homework?
Participant
Diastolic_1_Grp2
Diastolic_2_Grp2
1
90
107
17
+
2
106
108
2
+
3
109
100
-9
-
4
108
99
-9
-
5
95
100
5
+
6
94
103
9
+
7
102
106
4
+
8
94
108
14
+
9
106
107
1
+
10
93
99
6
+
11
92
100
8
+
12
103
98
-5
-
13
99
101
2
+
14
106
100
-6
-
15
109
107
-2
-
16
110
108
-2
-
17
97
106
9
+
18
105
98
-7
-
19
105
104
-1
-
20
110
107
-3
-
21
105
108
3
+
22
92
106
14
+
23
91
98
7
+
24
110
101
-9
-
25
99
103
4
+
26
107
98
-9
-
27
94
103
9
+
Positive=>
16
Negative=>
11
Explanation / Answer
1. False: Column G= Column F (Diastolic_2_Grp2) - Column E( Diastolic_1_Grp2)
2. True : No. of rises= 16 > 11=No. of falls
3. False: If the null hypothesis (H0) is rejected by using sign test at certain level of significance, then only we can say that Diastolic_1_Grp2 and Diastolic_2_Grp2 differ from one another statistically.
4. True : Sign test only takes into account the increases/decrease but not the amount of increase/decrease.
5. True
6. False: By using two tailed t-test, we attempt to show that the mean of Diastolic_1_Grp2 and Diastolic_2_Grp2 are not same.
7. Option B: The null hypothesis (H0) is accepted as the p-value of the test=0.33 which is greater than level of significance=0.05. So, There no statistical evidence that the means of two groups are different.