1. Your weight-lifting class performs a test of strength to see how many times they can bench press one-fourth of their body weight. The standard deviation of the class is 4.5. This type of test has a test-retest reliability coefficient = 0.88. a. What is the SEm?

b. What is the estimated standard deviation for any one person?

c. If someone performs 12 repetitions, what is the 68% confidence band?

d. What is the 95% confidence band?

e. If another student performs 15 repetitions, can you say that these two students have different abilities?