当一秒内的误码率劣于1×10-3门限值时,定义为()
参考答案:严重误码秒
从0,1,2,3,4中取若干个数字组成没有重复数字的自然数,求比3000大的偶数共有多少个?
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%.