A veterinarian collects data on the number of times race horses are raced during their career. The researcher finds the average number of races a horse enters isx‾= 15.3 with a standard deviation of s = 6.8 in a sample of n = 20 horses. The researcher notices one horse that has raced 45 times. This outlier poses a problem. What should the researcher do?

Drop the outlier and recalculate sample mean and standard deviation then proceed with a t-interval Increase the confidence level None of the choices are correct Choose a z-interval instead of a t-interval since a z-interval is not affected by outliers