Error Intervals

Question 1

A number is rounded to 1DP. The result is 6.7. Write down the error interval.

Answer 1

6.6, 6.65, 6.7, 6.75, 6.8
= 6.65 < or equal to x < 6.75

Question 2

A number X is rounded to one significant figure. The result is 2000. Write down the error interval for X.

Answer 2

1000, 1500, 2000, 2500, 3000
= 1500 < or equal to x < 2500

Question 3

A number X is truncated to 2 decimal places. The result is 2.85. Write down the error interval for X.

Answer 3

2.85 < or equal to X < 2.86

Question 4

A number is truncated to 1 significant figure. The result is 3000. Write down the error interval for X.

Answer 4

3000 < or equal to X < 4000