Arrange the height of 20 students in a grouped distribution table with a class interval of 5. The number of students whose height is below 170cm is ___
Heights (in cm): 150, 153, 162, 170, 186, 153, 162, 180, 165, 150, 178, 156, 184, 176, 173, 186, 159, 183, 180, 156.
10
HeightNumber of Students150−1544155−1593160−1642165−1691170−1742175−1792180−1844185−1892Total20
Number of students whose height is below 170 cm = 4 + 3 + 2 + 1= 10