Practice 10 questions on STAT - Introductory Statistics at The Charles A. Dana Center. Free AI-generated quiz on uNotes — track your score, retake anytime.
1A variable is classified as discrete if it takes a fixed set of possible numerical values and it is not possible to get any value in between. Which of the following is an example of a discrete variable according to the course materials?
2What is the required sum of all probabilities in a discrete probability distribution?
3Why is selecting a sample 'by eye' (such as picking 10 words from a paragraph) generally considered a biased sampling method?
4In the context of Justice Sotomayor's speech excerpt, if you calculate the mean word length for all 431 words in the entire excerpt, that value is a:
5According to the Law of Large Numbers, what happens as you increase the number of trials in a chance experiment?
6Which of the following statements about the Standard Error (SE) of a sample proportion are true?
7In a continuous probability distribution, how are probabilities for a range of values determined?
8If the true population proportion (p) for unemployment is 0.15, what is the theoretical mean of the sampling distribution of the sample proportion for samples of size n=50?
9What is a 'sampling frame'?
10In a carnival game with 20 ducks, 2 ducks win $10, 4 ducks win $5, and the rest win nothing. What is the theoretical probability of a participant winning NOTHING ($0 prize)?
