The t-distribution is similar to a normal distribution. However the t-distribution is _______.
举一反三
- A standard normal distribution is a normal distribution with:
- If n samples are extracted from any population with mean value [img=11x18]1803dc1a4012523.png[/img] and variance [img=18x22]1803dc1a48a9511.png[/img], then A: When n is sufficiently large, the distribution of sample mean is approximately normal distribution. B: When n<10, the distribution of sample mean is approximately normal distribution. C: The distribution of sample mean is nothing to do with n. D: No matter how big n is, the distribution of the sample mean is not going to be close to a normal distribution.
- As a general rule, the normal distribution is used to approximate the sampling distribution of the sample mean only if
- The normal approximation to the binomial distribution works best when the number of trials is large, and when the binomial distribution is symmetrical (like the normal).
- Gaussian distribution A: equal probability B: normal distribution C: area of a circle D: hash table