An investment advisor is trying to persuade an investor to switch from her current fund holdings, claiming that the advisor's portfolio recommendations have had a greater one-year return rate than the investor's current funds. Last year, the investor's annual return rate was 35%. Use a 0.01 level of significance to test the claim that the investments that the advisor recommends have a greater one-year return rate than 35%. Base your calculations on the sample of 40 return rates in the one-year return column of Data Set 10 in Appendix B. Is there sufficient evidence to support the advisor's claim? A real investor is not likely to invest in all 40 funds in Data Set 10. What additional statistic would help to portray the risk of switching to just a portion of the advisor's portfolio?