COB 191 final Exam Questions And Answers Verified 100% Correct

COB 191 final Exam Questions And Answers Verified 100% Correct when reporting the results of a conf interval estimation, what 3 pieces of info would be most important? - ANSWER- the parameter being estimated, the conf level, and the limits of the interval time series data - ANSWER- specific measurement taken over a range of time period cross sectional data - ANSWER- value collected from a number of subjects during a single time period simple random sampling - ANSWER- every member of the population for the sample has equal change of being chosen systematic sampling - ANSWER- every kth member of population is chosen (K= N/n) stratified sampling - ANSWER- divides population into mutually exclusive group/strata cluster sampling - ANSWER- divide to cluster that represent population (ie. melting pot) resampling - ANSWER- many samples from the same population polygon graph - ANSWER- graphs the midpoints of each class as a line rather than columb ogive graph - ANSWER- cumulative percentage polygon-- use a line graph that plots the cumulative relative frequency scatter plot graph - ANSWER- used to see the relationship between two points What is the relationship between the variance and consistency? - ANSWER- inverse outlier - ANSWER- a data value that has z-score above 3 or below -3 classical probability - ANSWER- used when the number of possible outcomes of the event of interest is known empirical probability - ANSWER- involves conducting an experiment to observe the frequency with which an event occurs subjective probability - ANSWER- when classical and empirical are not available define mutually exclusive - ANSWER- cannot occur at the same time binomial distribution - ANSWER- used to calculate the probability of a specific number of successes given certain data define a normal probability distribution - ANSWER- when the data tend to fell into the center of the distribution and when very high and very low values are fairly rare any normal distribution can be... - ANSWER- transformed into the standard normal distribution (z) using information obtained from a sample to estimate a characteristic of a population is - ANSWER- inferential stats which of the following can be reduced by proper interviewer training? - ANSWER- measurement error if you are unsure about one section of data, what type of statistical error can occur? - ANSWER- measurement error What type of data is: your professor's name - ANSWER- qualitative categorical data/nominal What type of data is: how many exams you have throughout the class - ANSWER- quantitative numerical data/ratio What type of data is: average percentage of an exam - ANSWER- quantitative numerical data/ratio What type of data is: how much you like your professor (a lot, a little, not at all) - ANSWER- qualitative categorical data/ordinal What type of data is: what time is your class - ANSWER- qualitative categorical data/ordinal