Sta 2381 - Study guides, Class notes & Summaries

STA 2381 Exam |Questions with Correct Verified Answers

STA 2381 Exam 2024|Questions with Correct Verified Answers

A _____ is a function of the population data. - ANSWER statistic Estimators are _____ variables. - ANSWER random _____ describe a population of interest, while _____ describe a sample. - ANSWER parameters; statistics What is the estimated value of x̄? - ANSWER μ (mu) _____ is the population standard deviation, while _____ is the sample standard deviation. - ANSWER σ (sigma); s

T/F) The probability distribution of all the possible sample meas composed from samples of size n is known as the sampling distribution of the sample mean - ANSWER True (T/F) The standard error of the sample mean is another term for the standard deviation of the sample mean - ANSWER True (T/F) With increasing sample size the sampling distribution of the sample mean approaches normality, regardless of the distribution of the population from which the data is sampled - ANSWER True

Descriptive Statistics v Inferential Statistics - ANSWER Descriptive statistics describes sets of data. Inferential statistics draws conclusions about the sets of data based on sampling. Population v Variable - ANSWER A population is a set of units of interest to a study. A variable is a characteristic or property of the units being studied. Population v Sample - ANSWER A population is a set of units of interest to a study. A sample is a subset of the units of a population.