Final answer:
To calculate the interquartile range of the given dollar values, arrange the values in ascending order, find the first quartile and third quartile, and subtract the first from the third quartile.
Step-by-step explanation:
To find the interquartile range of the dollar values of the mutual fund shares, you need to first arrange the values in ascending order: 2.6, 5.3, 5.7, 8.10, 9.1.
Next, find the first quartile (Q1) and the third quartile (Q3). Q1 is the median of the lower half of the data and Q3 is the median of the upper half of the data.
From the given data, Q1 = 5.3 and Q3 = 8.10. Finally, calculate the interquartile range (IQR) by subtracting Q1 from Q3: IQR = Q3 - Q1 = 8.10 - 5.3 = 2.8.