During a 2-month trial period, a company institutes an exercise break for its workers to see if this will improve their sense of well-being. A random sample of 69 workers are randomly chosen: during the first month they don't take any exercise breaks; during the second month they take two exercise breaks during their work day.

(a) Which type of hypothesis test should be conducted?

Two-sided paired t-test

Two-sided two-sample t-test

One-sided paired t-test

One-sided two-sample t-test

(b) The P-value for was found to be 0.025. For= 0.05, what is the appropriate conclusion?

Reject H₀:_D= 0. There is insufficient evidence that exercise breaks result in increased worker satisfaction.

Don't reject H₀:_D= 0. There is sufficient evidence that exercise breaks result in increased worker satisfaction.

Reject H₀:_D= 0. There is sufficient evidence that exercise breaks result in increased worker satisfaction.

Don't reject H₀:_D= 0. There is insufficient evidence that exercise breaks result in increased worker satisfaction.