The Cougar Swim Club acquired some Speedo Fastskin bodysuits as well as decided to test them out. A number of club's fastest swimmers performed a 50m freestyle swim in regular spandex bodysuit and in Speedo Fastskin suit. The table below summarizes their times in seconds (s).
|
Swimmer
|
spandex
|
Speedo Fastskin
|
|
1
|
31.1
|
29.1
|
|
2
|
28.9
|
30.4
|
|
3
|
31.4
|
25.3
|
|
4
|
34.9
|
31.7
|
|
5
|
27.7
|
28.2
|
|
6
|
36.7
|
32.9
|
|
7
|
33.3
|
28.6
|
|
8
|
30.8
|
26.2
|
Perform t-test for dependent means to find out if there is a difference between the regular spandex suit and Fastskin bodysuit in terms of performance.
1. t=?
2. df=?
3. critical value of t=? (use alpha =.05)
4. would you reject the null hypothesis?