Data Display Reasoning

Answer: 40≤ time <60

1. Cumulative frequencies are 6,12,19,26.
2. Observation 13 lies in 40≤ time <60.
3. The exact time within that interval is unknown.

Answer: Positive and approximately linear

1. As x increases, y generally increases at about a constant rate.

Answer: 25136​

1. x+y=25−7−6=12;
2. the ratio gives x=8,y=4.
3. To minimise the mean, put every time at its interval’s lower endpoint: 0,4,8,12.
4. The total is 136
5. the bound is 25136​ minutes.