2025\2026 A+ Grade
why do we collect samples?
- correct answer to collect data from populations to make inferences and answer questions about a
population of interest
element
- correct answer the entity for which data are collected
population
- correct answer the collection of al the elements of interest
sample
- correct answer a subset of the population
simple random sampling of size n from a population of size N
- correct answer a sample selected such that each possible sample of size n has the same probability of
occurring
point estimation
- correct answer a form of statistical inference in which we use data from a sample to compute a value
of a sample statistic that serves as an estimate of a population parameter
sampling distribution of x-bar
- correct answer the probability distribution of a possible values of the sample mean x-bar
expected value of sample mean
- correct answer population mean