Question

1. A researcher wants to investigate the relationship between 3 year olds watching Sesame Street and vocabulary. She asks the parents how much Sesame Street their child watches per week then ascertains how many words that child knows. The data is as follows:

Participant	Hours watching sesame street per week	words known
A	8	200
B	10	210
C	4	270
D	2	250
E	4	310
F	7	309
G	3	275
H	5	290
I	6	342

b. What are the null and research hypotheses?
c. What is the mean of X?
What is the mean of Y?
Find the deviances for both groups. (X – My) and (Y – My)
Multiply the deviances like in the lecture
Sum these.
What number do you get? ___________________________
This is the numerator
Square the deviances in X and Y
What is the Sum of Squares of X?
What is the Sum of Squares of Y?
What do you get when you multiply SSx and SSy? _______________________________
Take the square root of that ____________________________
This is your denominator
d. What is r? ______________________
e. What is the critical value? ___________________________________
f. What is your decision? __________________________

Answer 1