In: Statistics and Probability
A statistical analyst for the Wall Street Journal randomly selected six companies and recorded both the price per share of stock on January 1, 2009 and on April 30, 2009. The results are presented below. Suppose the analyst wished to see if the average price per share of stock on April 30, 2009 is less than the average price per share of stock on January 1, 2009 at α=.025.
Apr. 30, 2009 | 33 | 27 | 32 | 25 | 35 | 34 |
Jan. 1, 2009 | 40 | 28 | 30 | 34 | 48 | 36 |
For the hypothesis stated above, what is the P-value?
The p-value is:
The test:
For the score differences we have, mean is Dˉ=-5, the sample
standard deviation is sD=5.6214, and the sample size is n=6.
|
Let me know in the comments if anything is not clear. I will reply ASAP! Please do upvote if satisfied!