The one-year return (in %) for 24 mutual funds is as follows:
−6.3 2.9 5.3 10.4 −11.6 −3.1
25.8 −5.2 8.8 15.6 19.9 17.0
−4.0 −4.1 −1.8 19.2 −2.8 12.0
20.1 –9.9 8.0 10.1 −12.0 −10.8
a. Construct the frequency distribution using classes of −20 up to −10, −10 up to 0, etc.