Exhibit 10-3
A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information. 
-Refer to Exhibit 10-3. The point estimate for the difference between the means of the two populations is
Definitions:
Pearson Correlation
A measure of the linear correlation between two variables X and Y, giving a value between -1 and 1.
Positive Correlation
The relationship between two variables where both variables move in the same direction.
IQ Score
A measure of a person's intellectual abilities compared to the average population, typically scored on a scale where 100 is the average.
First-Grader
Refers typically to a student in the first grade of school, being their second year of formal education, usually six or seven years old in many countries.
Q11: A study of wage discrimination at a
Q12: Gradual shifting or movement of a time
Q21: Excel's RAND function<br>A)determines sample size<br>B)selects a simple
Q21: The probability distribution that can be described
Q30: Refer to Exhibit 10-9. At 90% confidence
Q34: If the cost of a Type I
Q59: Given below are seven observations collected in
Q60: The second stage of a two-stage acceptance
Q64: In a television commercial, the manufacturer of
Q87: A single numerical value used as an