In each of following data sets, tell whether the outlier seems certain to be due to an error, or whether it could conceivably be correct.

a The length of a rod is measured five times. The readings in centimeters are 48.5, 47.2, 4.91, 49.5, 46.3.

b. The prices of five cars on a dealer’s lot are $25,000, $30,000, $42,000, $110,000, $31,000.

Step 1 of 3:

Here,for the given data set we have to identify whether the outlier is due to an error or it would be conceivably correct.

Step 2 of 3:

(a)

Here it is given that the observations 48.5,47.2,4.91,49.5,46.3 represents the length of a rod which is measured five times.

Here we can observe that 4.91 is an outlier. This could be because of an error in recording the observation.

Thus,the outlier here is due to an error.