Flashcards
ECONS205 Mid semester test
Cards in this deck (14)
- 1what is location?mean, median, mode and geometric mean
- 2what is a point estimate?a single value given as an estimate of a parameter of a population.
- 3Multimodaldata contains 2 or more modes
- 4bimodaldata contains exactly two modes
- 5what is a geometric mean?While the arithmetic mean adds items, the geometric mean multiplies items.... defined as “…the nth root of the product of n numbers.”
- 6what is spread?variance, standard deviation and interquartile range
- 7what is standard deviation?Standard deviation measures the spread of a data distribution.
- 8what is interquartile range?difference between first and third quartiles
- 9what is the difference between Type I and Type II errors?In hypothesis testing: a type I error is the rejection of a true null hypothesis, while a type II error is failing to reject a false null hypothesis.
- 10what does the coefficient on ANOVA tell us?The effect of independent on dependent, - or + indicates direction of the effect. Single independent variable regression, it tells you how much the dependent variable will increase/decrease when the other variable goes up by one. (+ Ceteris Parabis in multiple regression)
- 11What is intercept on ANOVA?Intercept is the expected mean value of Y when all X=0
- 12What indicates using a confidence interval for mean?asking for C.I.; inclusion of standard error; inclusion of sample mean; inclusion of sample number. Use Z or T as required.
- 13What indicated the use of C.I. for difference between means?Asking for C.I. gives data for two populations: sample mean, standard error and number in sample. Use t or z where appropriate
- 14when do we use C.I. for proportions?we are given proportion figures and sample size. Use z or t where appropriate
Information
- Description
- Flashcards on ECONS205 Mid semester test, created by Laura K on 24/11/2018.
- Created by
- Laura K
- Views
- 0
- Rating