Question: The mean length of stay of employees in a dangerous industry is 16.7 months. One hundred randomly selected employees at my brother's café had a mean length of stay of 17.8 months. At the 0.05 significance level, do the data provide sufficient evidence to conclude the mean length of stay of employees at my brother's café differs from the mean length of stay at that dangerous industry? Assume that the population standard deviation of lengths of stay in that dangerous industry is 6.0 months.