Студопедия
Случайная страница | ТОМ-1 | ТОМ-2 | ТОМ-3
АвтомобилиАстрономияБиологияГеографияДом и садДругие языкиДругоеИнформатика
ИсторияКультураЛитератураЛогикаМатематикаМедицинаМеталлургияМеханика
ОбразованиеОхрана трудаПедагогикаПолитикаПравоПсихологияРелигияРиторика
СоциологияСпортСтроительствоТехнологияТуризмФизикаФилософияФинансы
ХимияЧерчениеЭкологияЭкономикаЭлектроника

Source DF Seq SS. Using MINITAB solution, answer the following questions.

Читайте также:
  1. Geographical Position and Natural Resources
  2. Source DF SEQ SS
  3. Source DF Seq SS

X1 1 401.42

X2 1 0.12

X3 1 20.67

D 1 4.28

 

Using MINITAB solution, answer the following questions.

a) Write the estimated regression equation.

b) Explain the meaning of obtained by estimating the given regression model.

c) What is the predicted value of y for ; ; ; and

d) Construct a 99% confidence interval for the coefficient of .

e) Using the 5% significance level, test the null hypothesis that the coefficient of is zero against two-sided alternative.

4. The salaries of workers are expected to be depending on the number of years they have spent in school and their work experience. The following table gives information on annual salaries (in thousands of dollars), number of years of studying, and years of experience for 10 persons. It also includes information on gender. In the table, M represents males and F refers to females.

 

Salary                    
Studying                    
Experience                    
Gender F F M M F F M M F M

 

Using MINITAB (or any other statistical software package), find the regression of salary on studying, experience, and gender. Then answer the following questions.

a) Write the estimated regression equation.

b) Explain the meaning of the estimated regression coefficient of the dummy variables.

c) By estimating the regression model with gender as a dummy variable, you have actually estimated two regression models-one for males and the other for females. Write these two regression equations.

d) How much salary is a male worker with 18 years of studying and 7 years of work experience expected to earn?

e) How much salary is a female worker with 18 years of studying and 7 years of work experience expected to earn?

f) Determine a 95% confidence interval for the coefficient of dummy variable.

g) Using the 5% significance level, can you conclude that female workers are paid lower salaries than male workers?

 


Дата добавления: 2015-08-05; просмотров: 151 | Нарушение авторских прав


Читайте в этой же книге: Predictor Coef St. dev. T P | Confidence interval for individual coefficients | Predictor Coef St. dev. T P | Source DF SEQ SS | Test of hypothesis about individual coefficients | Predictor Coef St. dev. T P | Tests on sets of regression parameters | Dummy variables in the regression models | Source DF Seq SS | Areas under continuous probability density functions |
<== предыдущая страница | следующая страница ==>
Exercises| Introduction

mybiblioteka.su - 2015-2024 год. (0.006 сек.)