If the reported measurement using a ruler marked to 1 micrometer is 5 micrometers, there could be a range of values for the actual measurement due to potential sources of error in the measurement process. The range of values can be estimated based on the precision and accuracy of the measuring instrument.
In this case, the ruler is marked to 1 micrometer, which means it has a precision of 1 micrometer. However, the accuracy of the measurement depends on various factors such as the alignment of the ruler, human error, or any other potential sources of measurement error.
Considering these factors, a reasonable range for the actual measurement could be within ±1 micrometer of the reported value. Therefore, the range of values for the actual measurement could be estimated as 4 to 6 micrometers.