Probability Distributions

The shape of the normal probability distribution
1. Skewed to the right
2. Skewed to the left
3. Symmetrical
Which statement does NOT describe the meaning of ALPHA?
1. area to the right of a z-score
2. probability of a type I error
3. level of confidence
4. level of significance
The shape of the chi-square distribution
1. Symmetrical
2. Skewed to the right
3. Bimodal
The binomial distribution is used for
1. discrete random variables
2. continuous random variables
3. any random variable
A t-score can be used whenever you have
1. a normal distribution, but the population mean is unknown
2. a normal distribution, but the population standard deviation is unknown
3. a normal distribution, but the sample standard deviation is unknown
4. a normal distribution, but the sample mean is unknown
The standard normal distribution uses
1. z-scores
2. t-scores
3. s-scores
4. chi-square scores
An experiment having n independent trials with each trial having only two possible outcomes
1. binomial probability distribution
2. standard normal distribution
3. student t-distribution
4. chi-square distribution
Name the theorem:
The sampling distribution of sample means will become normal as the sample size increases.
1. Fundamental Theorem of Probability
2. Normality Theorem
3. Central Limit Theorem
When alpha is small such as .001, the research is
1. highly significant (life-and-death)
2. scientific (like science fair)
3. non-significant (such as opinion surveys)
In hypothesis testing, which decision is likely to result from having a small p-value?
1. fail to reject Ho
2. accepting Ho
3. rejecting Ho

Probability Distributions

Quiz