1) A cruise line wants to find out if people are happier taking cruises with city or beach destinations. They ask 6 people on a beach cruise and 6 people on a city cruise to rate how happy they are on a scale of 1-10, with 10 being the highest rating possible. Is there a difference in how happy the beach and city cruise people were?
| Beach | City |
| 5 | 2 |
| 6 | 4 |
| 8 | 3 |
| 4 | 2 |
| 6 | 3 |
| 9 | 2 |
Video solution for problem
slides for independent samples t test demo 1
2) A sponsoring company wants to find out if Asian or European climbers are better. They measure how many attempts it takes 5 Asian climbers and 5 European climbers to get to the top of a difficult route.
| European | Asian |
| 4 | 3 |
| 3 | 5 |
| 5 | 1 |
| 6 | 7 |
| 4 | 2 |
Video solution to problem
slides for independent samples t test demo 2
Answers
1) People are happier with beach cruises (M = 6.34, SD = 1.86) than city cruises (M = 2.67, SD = 0.82) (t (10) = 4.42, p < 0.05, Cohen’s d= 2.55).
2) There is no difference in the amount of attempts Europeans (M = 4.4, SD = 1.14) and Asians needed (M = 3.6, SD = 2.41) (t (8) = 0.67, p > 0.05, Cohen’s d= 0.43).
More videos demonstrating hand calculations
More sample problems
http://web.mst.edu/~psyworld/texample.htm
http://psychnut.com/statistics/practice-problems-ttest/
http://psychnut.com/statistics/more-practice-problems-ttest/
So impressed with this e-book. So much beneficial content here, which makes the class A LOT less daunting!