The following data for five years of the annual returns for two of Vanguard’s mutual funds, the Vanguard Energy Fund (x) and the Vanguard Healthcare Fund (y), were given as s_x = 35.77, s_y = 13.34, s_xy = 447.68. Which of the following is the value of the sample correlation coefficient?

Multiple Choice

• 0.88
• 0.94
• 0.78
• -0.78