QUESTION 1
The following information relates to questions 1-3.
In a survey of 400 likely voters, 215 responded that they would vote for the incumbent, and 185 responded that they would vote for the challenger. Let p denote the fraction of al likely voters who preferred the incumbent at the time of the survey, and let p be the fraction of survey respondents who preferred the incumbent.
Construct a 95% confidence interval for p.
Lower bound:
Upper bound:
Please report all answers to four decimal places.

QUESTION 2
Using the same data from Question 1, construct a 99% confidence interval for p.
Lower bound:
Upper bound:
Please report all answers to four decimal places.

QUESTION 3
Without doing any additional calculations test the hypothesis Ho: P = 0.50 Vs. H1: P #f 0.50 at the 5% significance level. Is the null hypothesis rejected?
Yes
No

QUESTION 4
The following information relates to Questions 4-6. (This set of questions is based on Exercise 4.2 from the textbook.)
Suppose a random sample of 100 20-year-old men is selected from a population and that these men's height and weight are recorded. A regression of weight on height yields:
Weight = -79.24 + 4.16 * Height,
R² = 0.7200
SER = 12.6
where Weight is measured in pounds and Height is measured in inches. SER stands for the standard error of the regression.
What is the regression's weight prediction for someone who is:
(i) 64 inches tall?
pounds
(ii) 68 inches tall?
pounds
(iii) 72 inches tall?
pounds
Please report all answers to two decimal places.

QUESTION 5
Use the equation from Question 4 to answer this question.
A man has a late growth spurt and grows 2 inches over the course of a year. What is the regression's prediction for the increase in this man's weight?
Please report your answer to two decimal places.

QUESTION 6
Suppose that instead of measuring Weight and Height in pounds and inches, these variables are measured in centimeters and kilograms. What are the regression estimates from this
new centimeter-kilogram regression?
(For the purpose of this exercise, assume that 1 inch = 2.54cm, and 1 pound = 0.4536kg)
The new intercept is
The new slope is
The new R²
is
The new SER is
Please round all answers in this question to four decimal places (even if the original equation only presented some of these values to fewer decimal places).

QUESTION 1 The following information relates to questions 1-3. In...