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= 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 is = 15.3 with a standard deviation of Sx 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? Increase the confidence level. Choose a z-interval instead of a t-interval, since a z-interval is not affected by outliers. Delete the outlier and recalculate the new sample mean and standard deviation, then proceed with a t-interval. Because of the outlier, the t-methods are not appropriate to use. Other methods should be used to find this interval.

= 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 is = 15.3 with a standard deviation of Sx 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? Increase the confidence level. Choose a z-interval instead of a t-interval, since a z-interval is not affected by outliers. Delete the outlier and recalculate the new sample mean and standard deviation, then proceed with a t-interval. Because of the outlier, the t-methods are not appropriate to use. Other methods should be used to find this interval.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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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 is = 15.3 with a standard deviation of sx = 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? Increase the confidence level. Choose a z-interval instead of a t-interval, since a z-interval is not affected by outliers. Delete the outlier and recalculate the new sample mean and standard deviation, then proceed with a t-interval. Because of the outlier, the t-methods are not appropriate to use. Other methods should be used to find this interval.
Transcribed Image Text: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 is = 15.3 with a standard deviation of sx = 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? Increase the confidence level. Choose a z-interval instead of a t-interval, since a z-interval is not affected by outliers. Delete the outlier and recalculate the new sample mean and standard deviation, then proceed with a t-interval. Because of the outlier, the t-methods are not appropriate to use. Other methods should be used to find this interval.
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