Question: That same CEO, upon being named CEO, also expressed concern about the quality of the senior management in one of the major companies in the group. She felt that this group of managers was out of touch with new technology, new market opportunities and so on. In spite of boardroom opposition, the CEO has tried to encourage a younger age structure among these senior managers implementing some different promotion and recruitment policies. When the CEO was appointed, the data she had indicated that the mean age of senior managers in the group was 53 years old. A recent sample of 35 senior managers has an average age of 46 with a standard deviation of 4.5 years. Can the CEO conclude that her changes in policies have had the effect of reducing the mean age of senior managers? Justify your response. Use a significance level of 5%.