Question

The Cougar Swim Club acquired some Speedo Fastskin bodysuits and decided to test them out. A number of the club's fastest swimmers performed a 50m freestyle swim in a regular spandex bodysuit and in a 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	32.0
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 a t-test for dependent means to determine if there is a difference between the regular spandex suit and the Fastskin bodysuit in terms of performance.

t =

df =

Critical value of t = (use alpha = 0.05)

Would you reject the null hypothesis?

Answer 1

from above test statistic t =2.215

df=7

critical value of t =2.365

fail to reject the null hypothesis