Statistics Questions & Answers

Statistics Questions & Answers A ______________ is a quantitative variable that has either a finite number of possible values or a countable number of possible values (countable). - ANSWER: discrete variable A _______________ is a quantitative variable that has an infinite number of possible values that are not countable (measurable). - ANSWER: continuous variable A sample in which the individuals are easily obtained and not based on randomness is ______________. - ANSWER: convenience sample A sample size n from a population of size N is obtained through ______________. - ANSWER: simple random sampling A simple random sample is always preferred because it obtains the same information as other sampling plans but requires a smaller sample size? - ANSWER: False because, quite often, the goal is not to obtain the best sample, but to obtain as much information as possible about the population at the least cost. With this goal in mind, it may be advantageous to use sampling techniques other than simple random sampling. A(n) __________ _________ design is one in which each experimental unit are paired up. - ANSWER: matched-pairs design A(n) __________ _________ design is one in which each experimental unit is randomly assigned to a treatment. - ANSWER: completely randomized design A(n) __________ is a numerical summary of a population. - ANSWER: parameter A(n) __________ is a numerical summary of a sample. - ANSWER: statistic