Download STAT 101 Exam 2 Question & Answers 2025 and more Exams Nursing in PDF only on Docsity!
popuation - CORRECT ANSWERS ✔✔-the entire group of cases we want information on -larger than the sample -impractical/expensive to talk to everyone sample - CORRECT ANSWERS ✔✔-smaller than the population -typically used instead of the population to gather information from parameters are numerical summaries about the population and are usually ______ to know with certainty - CORRECT ANSWERS ✔✔impossible statistics are numerical summaries about the sample and are ______ to calculate - CORRECT ANSWERS ✔✔possible symbols that denote statistics - CORRECT ANSWERS ✔✔p with an arrow on top, r, y with a bar on top, s symbols that denote parameters - CORRECT ANSWERS ✔✔smooth p, u with a line on the left side, normal p, o with a line coming from the top
sampling fram - CORRECT ANSWERS ✔✔a list of every case in the population sampling variability - CORRECT ANSWERS ✔✔sample-to-sample differences in statistics convenience sample - CORRECT ANSWERS ✔✔when participants are chosen for a sample based on ease of access voluntary response sample - CORRECT ANSWERS ✔✔when people select themselves for a sample undercoverage - CORRECT ANSWERS ✔✔when some portion of the population is excluded from the sampling frame response bias - CORRECT ANSWERS ✔✔leading questions and the possibility that people will not answer truthfully non-response bias - CORRECT ANSWERS ✔✔when people choose not to participate in the survey
observational study - CORRECT ANSWERS ✔✔when researchers make no attempt to assign values of the variable to certain people, but instead simply observe them experiment - CORRECT ANSWERS ✔✔when researchers manipulate values of an explanatory variable or variables retrospective study - CORRECT ANSWERS ✔✔a study that looks at data that has already been collected prospective study - CORRECT ANSWERS ✔✔a study that looks at data which will be collected in the future an observational study ______ show association between variables, but ______ show causation - CORRECT ANSWERS ✔✔can; cannot an experiment ______ show causation between variable because the treatments are randomly assigned - CORRECT ANSWERS ✔✔can factor - CORRECT ANSWERS ✔✔the variable being manipulated by the researcher in order to observe a response
response variable - CORRECT ANSWERS ✔✔the outcome of an experiement experimental units - CORRECT ANSWERS ✔✔who or what the experiment is performed on levels - CORRECT ANSWERS ✔✔the specific values the experimenter choose for a factor treatments - CORRECT ANSWERS ✔✔the combination of factors and levels in the experiment the minimum number of levels that a factor can have - CORRECT ANSWERS ✔✔ 2 four principles of experiments - CORRECT ANSWERS ✔✔replication, control, randomization, blocking control - CORRECT ANSWERS ✔✔the process of keeping all other variable except the treatment the same for all experimental units
statistical significance - CORRECT ANSWERS ✔✔the results of an experiment when the observed differences between treatment groups are much larger than the differences expected control group - CORRECT ANSWERS ✔✔the group that receives no treatment blinding - CORRECT ANSWERS ✔✔when the experimenter and/or the subjects do not know which treatment they are receiving placebo - CORRECT ANSWERS ✔✔a fake treatment that resembles a real treatment confounding - CORRECT ANSWERS ✔✔when levels of one factor are associated with levels of another factor trial - CORRECT ANSWERS ✔✔each occasion upon which a random phenomenon is observed outcome - CORRECT ANSWERS ✔✔the value of the random phenomenon
event - CORRECT ANSWERS ✔✔a combination of possible outcomes sample space - CORRECT ANSWERS ✔✔the collection of all possible outcomes simulation - CORRECT ANSWERS ✔✔repeating an event multiple times probability - CORRECT ANSWERS ✔✔the events chance of an event occurring the outcome of a random event is - CORRECT ANSWERS ✔✔unknown before the event occurs and the long term behavior of the event is known empirical probability - CORRECT ANSWERS ✔✔based on the long term behavior of an event theoretical probability - CORRECT ANSWERS ✔✔is based on a mathematical model with assumptions
