Last Modified: 2012-04-15
(It is an expected condition that the individuals in the study are unaffected by one another.)
A real estate firm collected data from home sales to study the relationship between area of living space measured in square feet (x) and the selling price in dollars (y). The 95% confidence interval for the population slope β is 62.37 ± 7.18. From this result, we are 95% confident that the least-squares estimate for slope is between about 54.19 and 68.55.
What formula is this:
ŷ = a + bx
What do the symbols mean in the following equation:
ŷ = a + bx
a = y intercept
b = slope
x = x variable used to predict y
residual = observed y - predicted y
(or = y − ŷ )
1) Linearity (straight line)
3) Independence (no matched pairs, blocking, etc)
4) Equal standard deviations (no funnels)
That there is no linear relationship between x and y in the population.
The mean of y does not change at all when x changes.
So, H0: β = 0 means there is no relationship.
Historically, returns on investments in the stock market are about 7% per year. The 7% figure is a:
not a p
Words From Our Students
"StudyBlue is great for studying. I love the study guides, flashcards, and quizzes. So extremely helpful for all of my classes!"
Alice, Arizona State University
"I'm a student using StudyBlue, and I can 100% say that it helps me so much. Study materials for almost every subject in school are available in StudyBlue. It is so helpful for my education!"
Tim, University of Florida
"StudyBlue provides way more features than other studying apps, and thus allows me to learn very quickly! I actually feel much more comfortable taking my exams after I study with this app. It's amazing!"
Jennifer, Rutgers University
"I love flashcards but carrying around physical flashcards is cumbersome and simply outdated. StudyBlue is exactly what I was looking for!"