It is known that for right-handed people, the dominant (right) hand tends to be stronger. For left-handed people who live in a world designed for right-handed people, the same may not be true. To test this, muscle strength was measured on the right and left hands of a random sample of 15 left-handed men. The alternative hypothesis is one-sided (left hand stronger). The resulting t-statistic was 1.80. This is an example of