All employees in a firm have recently received professional

All employees in a firm have recently received professional development training that is designed to improve their productivity. A manager wants to know whether or not the training has been effective by comparing employee productivity data before and after the training

Solution

All employees in a firm have recently received professional development training that is designed to improve their productivity. A manager wants to know whether or not the training has been effective by comparing employee productivity data before and after the training

decide which of the following four methods is appropriate.

One sample t test

Paired samples t test

Independent samples t test

One-way analysis of variance (ANOVA)

The correct method is Paired samples t test.

The paired t-test calculates the difference within each before-and-after pair of measurements, determines the mean of these changes, and reports whether this mean of the differences is statistically significant.