A researcher is testing whether the average age of employees in a large firm is statistically different from 35 years ( either above or below). A sample is drawn of 250 employees and the researcher determines that the appropriate critical value for the test statistic is 1.96. The value of the computed test statistic is 4.35. Given this information, which of the following statements is FALSE The test:（）
A. is two- tailed.
B. indicates that the researcher will reject the null hypothesis.
C. has a significance level of 95%.
参考答案：C
解析：
This test has a significance level of 5%. The relationship between confidence and significance is: significance level =1- confidence level. We know that the significance level is 5% because the sample size is large and the critical value of the test statistic is 1.96 (2.5% of probability is in both the upper and lower tails).