Which of the following statements is true about the t-test?
A. In order to conduct a t-test, the sample size should be larger than 30.
B. The t-test cannot be used when the population standard deviation is unknown.
C. The t-test cannot be used for interval or ratio data.
D. The larger the value of the standard error of the difference between two means, the larger the value of t.
E. The t-test provides a mathematical way of determining if the difference between two sample means has occurred by chance.
Answer: E
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