Perfect Positive correlation
95. Which correlation is very low?
|
Perfect Negative correlation
96. find error in y=-4+6x if there is y=8 and x=3
|
97. find residual in y=-4+6x if there is y=8 and x=3
|
98. find residual in y=-5+6x model if there is y=9 and x=3
|
99. to test normal distribution of data if skewness is 88, which of the following is true?
|
100. to test normal distribution of data if kurtosis is 88, which of the following is true?
|
101. find residual in y=-17+9x if there is y=8 and x=3
|
102. find residual in y=-15+9x if there is y=12 and x=3
|
103. The augmented Dickey-Fuller unit root test can be used to test for
|
stationarity
104. In the acronymn “ARIMA,” what does the “I” stand for?
|
Integrated
105. The value of r is always-
|
Between -1and 1
106. Values of r close to –1 or to +1 indicate
|
A stronger linear relationship between x1 and x2
If r = 0 there is absolutely no linear relationship between X1 and X2 (no linear correlation).
If r = 1, there is perfect positive correlation.
If r = –1, there is perfect negative correlation. In both these cases, all of
the original data points lie on a straight line: ANY straight line no matter what the slope. Of course, in the real world,
this will not generally happen.
110. when X1 increases, X2 tends to increase and when X1 decreases, X2 tends to decrease
|
Positive correlation
111. when X1 increases, X2 tends to decrease and when X1 decreases, X2 tends to increase
|
Negative correlaion
x
113. Which one is the dependent variable in following linear equations
y = –0.01 + 1.2x
|
y
b
115. For the linear equation y = a + bx , Which one is intercept
|
a
116. For the linear equation y = a + bx If b > 0
|
Y = a + bx. (a) If b > 0, the line slopes upward to the right.
117. For the linear equation y = a + bx If b = 0
|
If b = 0, the line
is horizontal.
118. For the linear equation y = a + bx If b < 0
|
If b < 0, the line slopes downward to the right.
119. The equation that will be estimated with a sample of data for two independent variables will thus be
|
yi = b0 + b1x1i + b2x2i + ei
As with our earlier work with probability distributions, this model works only if certain assumptions hold. These are that
The Y is normally distributed, the errors are also normally distributed with a mean of zero and a constant standard deviation,
And that the error terms are independent of the size of X and independent of each other.
120. which one is simple regression
|
This is the general form that is most often called the multiple regression model. So-called "simple" regression analysis has
only one independent (right-hand) variable rather than many independent variables. Simple regression is just a special case
of multiple regression.
121. which one is multiple regression model
|
122. The term y0 - ŷ0 = e0 is called the
|
The term y0- ŷ0 = e0
is called the "error" or residual.
123. The term y0 - ŷ0 = e0 is called the
|
Y0
Is the residual for the point shown
/1.25
125. calculate the variance
6
4
7
3
|
/2.5
126. calculate the variance
9
8
7
5
|
127. calculate the variance
10
12
4
5
|
128. calculate the variance
8
5
2
4
|
129. calculate the variance
6
4
5
7
|
130. calculate the variance
5
8
7
4
|
131. calculate the variance
9
6
3
8
|
132. calculate the variance
1
5
9
7
|
133. calculate the variance
7
5
3
1
|
134. find residual in y=2+10x if there is y=8 and x=3
|
24
135. find residual in y=3-9x if there is y=8 and x=3
|
16
136. find residual in y=4+8x if there is y=8 and x=3
|
20
137.find residual in y=5-7x if there is y=8 and x=3
|
8
138. find residual in y=6+6x if there is y=8 and x=3
|
16
139. find residual in y=7-4x if there is y=8 and x=3
|
3
140. find residual in y=8+5x if there is y=8 and x=3
|
15
141. find residual in y=9-4x if there is y=8 and x=3
|
5
142. find residual in y=12+3x if there is y=8 and x=3
|
13
143. find residual in y=14-2x if there is y=8 and x=3
|
0
144. find residual in y=7+10x if there is y=8 and x=3
|
29
145. find residual in y=15-9x if there is y=8 and x=3
|
4
146. find residual in y=16+8x if there is y=8 and x=3
|
32
147. find residual in y=23-7x if there is y=8 and x=3
|
6
148. find residual in y=5+6x if there is y=8 and x=3
|
15
149. find residual in y=6-4x if there is y=8 and x=3
|
2
150. find residual in y=7+5x if there is y=8 and x=3
|
14
151. find residual in y=9-8x if there is y=8 and x=3
|
7
152. find residual in y=22+3x if there is y=8 and x=3
|
23
153. find residual in y=11-2x if there is y=8 and x=3
|
3
154. Calculate the mean.
2
3
5
4
11
12
5
|
6
155. Calculate the mean.
6
4
7
3
8
5
7
|
40/7
156. Calculate the mean.
9
8
7
5
7
8
10
|
54/7
157. Calculate the mean.
10
12
4
5
12
10
11
|
64/7
158. Calculate the mean.
8
5
2
4
5
4
2
|
30/7
159. Calculate the mean.
6
4
5
7
8
5
7
|
6
160. Calculate the mean.
5
8
7
4
8
9
6
|
47/7
60/7
162. Calculate the mean.
1
5
9
7
4
8
12
|
46/7
163. Calculate the mean. var10
7
5
3
1
5
6
22
|
7
164. Determine population in the following study.
A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated lastyear.
|
All students who graduated from the college last year
165. Determine statistic in the following study.
A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated lastyear.
|
the average cumulative GPA of students in the study who graduated from the college last year
166. Determine parameter in the following study.
A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated lastyear.
|
the average cumulative GPA of students who graduated from the college last year
167. Determine sample in the following study.
A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated lastyear.
|
A group of students who graduated from the college last year, randomly selected
168. Determine variable in the following study.
A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated lastyear.
|
the cumulative GPA of one student who graduated from the college last year
169. Determine data in the following study.
A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated lastyear.
|
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