A random sample of 1,556 employees at Boris&Boris, Inc., Russia, has been asked to attend an ethics workshop. The employees were asked to rate the following statement from a scale from 1 (strongly disagree) to 7 (strongly agree): Only senior executives play a crucial role in environment sustainability. The sample mean response was 4.04, and the sample standard deviation was 1.22. Test at the 1% significance level, against a two-sided alternative, the null hypothesis that the population mean is 4.