Question
In: Statistics and Probability
1. You are provided a sample of data on a criterion variable Y and predictor variable...
1. You are provided a sample of data on a criterion variable Y and predictor variable X for which 4 distinct subgroups can be identified. Based on these data, you calculate the sample correlation coefficients in the table to the right ==>
| Group | Sample Corr. Coeff. | Sample Sizes |
| 1 | 0.215 | 97 |
| 2 | 0.351 | 86 |
| 3 | 0.277 | 73 |
| 4 | 0.591 | 91 |
| Provide a test of the null hypothesis that the population correlation coefficients are equal across these four groups against the alternative the H0 is not true: |
| a. Calculated Chi-Square statistic |
| b. Critical (upper) Chi-Square for α=5% |
| c. Conclusion for α=5% |
| d. Critical (upper) Chi-Square for α=1% |
| e. Conclusion for α=1% |
Solutions
orchestra answered 3 years agoRelated Solutions
Which is the predictor variable (X) and which is the criterion variable (Y) for each of...
Which is the predictor variable (X) and which is the criterion
variable (Y) for each of the following examples?
a. A researcher tests whether the size of an audience can
predict the number of mistakes a student makes during a classroom
presentation.
b. A military officer tests whether the duration of an overseas
tour can predict the morale among troops overseas.
c. A social psychologist tests whether the size of a toy in
cereal boxes can predict preferences for that...
The following information regarding a dependent variable (y) and an independent variable (x) is provided. y&nb
The following information regarding a dependent variable
(y) and an independent variable (x) is
provided.
y x
2 9
4 7
5 6
5 4
7 5
8 1
Determine the least squares estimate of the
y-intercept, slope, and coefficient of determination
(?2).
1. Find the regression equation, letting the first variable be the predictor (x) variable. Using the...
1. Find the regression equation, letting the first variable be
the predictor (x) variable. Using the listed actress/actor ages
in various years, find the best predicted age of the Best Actor
winner that year is 44 years. Is the result within 5 years of the
actual Best Actor winner, whose age was 42 years?
Best actress: 28 29 30 61 32 35 46 28 61 23 44 51
Best Actor: 44 38 37 45 52 46 58 48 40 53...
The following information regarding a dependent variable (Y) and an independent variable (X) is provided to help you fill in the following blanks.
The following information regarding a dependent variable (Y) and
an independent variable (X) is provided to help you fill in the
following blanks.Y X4 23 14 46 38 5SSE = 6SST = 16The coefficient of correlation is? (Please show
calculations)
Consider data regarding a response y and an explanatory variable x, both numeric x y 1...
Consider data regarding a response y and an explanatory variable
x, both numeric
x
y
1
2.8
0.7
2
2.6
1.3
3
6.8
-1.1
4
3.0
0.2
5
4.7
1.1
6
5.0
-0.1
7
5.0
0.9
8
2.9
1.0
9
7.0
-0.2
10
3.7
0.8
The null hypothesis that the expected value of the response is
constant for all values of the explanatory variable is:
Select one:
a. Not rejected with a significance level of 5%.
b. Rejected with a...
Suppose we have the following data on variable X (independent) and variable Y (dependent): X Y...
Suppose we have the following data on variable X (independent)
and variable Y (dependent):
X
Y
2
70
0
70
4
130
a.) By hand, determine the simple regression equation relating Y
and X.
b.) Calculate the R-Square measure and interpret the result.
c.) Calculate the adjusted R-Square.
d.) Test to see whether X and Y are significantly related using
a test on the population correlation. Test this at the 0.05
level.
e.) Test to see whether X and Y...
Suppose we have the following data on variable X (independent) and variable Y (dependent): X Y...
Suppose we have the following data on variable X (independent)
and variable Y (dependent):
X Y
2 70
0 70
4 130
Test to see whether X and Y are significantly related using a
t-test on the slope of X. Test this at the 0.05 level.
Test to see whether X and Y are significantly related using an
F-test on the slope of X. Test this at the 0.05 level.
Suppose we have the following data on variable X (independent) and variable Y (dependent): X Y...
Suppose we have the following data on variable X (independent)
and variable Y (dependent):
X
Y
2
70
0
70
4
130
a.) By hand, determine the simple regression equation relating Y
and X.
b.) Calculate the R-Square measure and interpret the result.
c.) Calculate the adjusted R-Square.
d.) Test to see whether X and Y are significantly related using
a test on the population correlation. Test this at the 0.05
level.
e.) Test to see whether X and Y...
Suppose we have the following data on variable X (independent) and variable Y (dependent): X Y...
Suppose we have the following data on variable X (independent)
and variable Y (dependent):
X Y
2 70
0 70
4 130
By hand, determine the simple regression equation relating Y
and X.
Calculate the R-Square measure and interpret the result.
Calculate the adjusted R-Square.
Test to see whether X and Y are significantly related using a
test on the population correlation. Test this at the 0.05
level.
Test to see whether X and Y are significantly related using a...
Suppose we have the following data on variable X (independent) and variable Y (dependent): X Y...
Suppose we have the following data on variable X (independent)
and variable Y (dependent):
X
Y
2
70
0
70
4
130
(SOLVE ALL BY HAND, NOT BY USING EXCEL)
By hand, determine the simple regression equation relating Y
and X.
Calculate the R-Square measure and interpret the result.
Calculate the adjusted R-Square.
Test to see whether X and Y are significantly related using a
test on the population correlation. Test this at the 0.05
level.
Test to see whether...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- The correlation between X and Y ______________. Question options: measures the variation around the predicted regression...
- Will iron(III) hydroxide precipitate from a pH = 1.00 solution with [Fe3+] = 1.0 x 10-5?...
- What do you believe happens during the final scene of the story between the brothers at....
- A 5.171 g sample of a solid, weak, monoprotic acid is used to make a 100.0...
- 1. Creep is one of deformation that occurred in concrete structure. Give one example that can...
- Why does a particular codon represent only one specific amino acid?
- Write a function template sort that takes two references to generic objects and switches them if...
ADVERTISEMENT