Question

ch 15 a veterinary researcher takes an srs of 60 horses presenting with colic. the average age of the 60 horses with colic is 12 years. the average age of horses seen at the veterinary clinic was determined to be 10 years. the researcher concludes that horses with colic are older. the value 12 is a standard deviation of the sample mean. a population mean. a sample mean. a standard error of the mean. question 15 1 pts ch 15 a statistic is a number that can be computed from the sample data to estimate an unknown population parameter. true false

Explanation:

1. For the first question, the value 12 is the average age of a sample (60 horses with colic), so it is a sample mean. A sample mean is calculated from sample data. The population here would be all horses seen at the veterinary - clinic, and 12 is not related to the standard deviation of the sample mean or standard error of the mean. Also, it's not a population mean as it's from a sample.
2. For the second question, by definition, a statistic is a number computed from sample data to estimate an unknown population parameter. For example, sample mean, sample standard deviation are statistics used to estimate population mean and population standard deviation respectively.

Answer:

1. C. a sample mean.
2. True