Question

question 1 what are the boundaries of the class 1.87–3.43 ?
○ a. 1.879 - 3.439
○ b. 1.87 - 3.43
○ c. 1.82 - 3.48
○ d. 1.865 - 3.435

Explanation:

Step1: Find the lower boundary

To find the lower boundary of a class interval, we take the lower limit and subtract half of the unit of measurement. The unit of measurement here is 0.01 (since the values are to two decimal places). Half of 0.01 is 0.005. So, for the lower limit 1.87, the lower boundary is $1.87 - 0.005 = 1.865$.

Step2: Find the upper boundary

For the upper boundary, we take the upper limit and add half of the unit of measurement. The upper limit is 3.43, so the upper boundary is $3.43 + 0.005 = 3.435$.

Answer:

d. 1.865 - 3.435