The accompanying data file contains three variables, x₁, x₂, and x₃.

Click here for the Excel Data File

Bin the values of x₁ into three equal-size groups. Label the groups with numbers 1 (lowest values) to 3 (highest values). How many observations are assigned to group 2?

Bin the values of x₂ into three equal-interval groups. Label the groups with numbers 1 (lowest values) to 3 (highest values). How many observations are assigned to group 2?

Bin the values of x₃ into the following three groups: <50,000, between 50,000 and 100,000, and > 100,000. Label the groups with numbers 1 (lowest values) to 3 (highest values). How many observations are assigned to group 3?

x1	x2	x3
119	23	174000
148	22	1000
140	26	123000
128	39	17000
108	14	0
155	20	95000
166	24	133000
213	37	48000
156	10	55000
118	17	162000
158	19	17000
141	36	106000
162	29	63000
117	16	66000
134	14	81000
177	17	90000
117	16	132000
175	15	1000
139	19	49000
166	23	174000
120	23	28000
167	26	75000
142	22	148000
130	24	175000
131	14	155000
160	39	80000
98	26	76000
140	43	98000
166	27	164000
167	34	151000
146	31	146000