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DSST Intro To Statistics

Subjects : dsst, statistics
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Information about individuals in a population






2. Null hypothesis






3. Occur when one of them affects the probability of the other.






4. When the distribution of the data values greater than the center of the display - and the data values less than the center of the display are mirror images of each other






5. Population size






6. Complement of p






7. Parameter






8. _______________ are numerical measurements that can assume any value between two numbers






9. An individual data value which lies far (above or below) from most or all of the other data values within a distribution






10. The number of times each data value occurs






11. Standard scores and percentile






12. Is denoted by 'N' - is the number of data values in the population






13. Data values that are either much larger or much smaller than the general body of data- they should be included in an analysis unless they are the result of human or other error






14. Sample size or number of trials






15. Mean - mode - median and midrange.






16. Middle value of a set of data values after they've been arranged in numerical order - 1. First arrange data values in numerical order 2. For odd # of data values - the median is the middle data value 3. For even # of data values - the median is the m






17. Square the standard deviation and to find the population variance square of the population standard deviation






18. Has the same shape and horizontal scale as a histogram - but the vertical scale is marked with relative frequencies instead of actual frequencies






19. A quantity calculated from data gathered from a sample- usually used to estimate a population parameter






20. _______________ are numerical values that can assume only a limited number of values






21. When the distribution of the data values tend to be concentrated toward one end of the display or tail of the distribution - while the data values in the other tail are spread out through extreme values resulting in a longer tail






22. Create a sample by using data from population members that are readily available






23. A numerical quantity measuring some aspect of the population






24. Population is organized into groups (i.e - neighborhoods/departments) - and sampling unit is selected by a simple random sample






25. An efficient method of graphing information using actual amounts: clusters - gaps - outliers are clearly identified.






26. Lowercase sigma; population standard deviaition






27. Collection of information from a sample






28. Represents categories - and is nonnumerical in nature






29. Sum of the values






30. The level of significance and the probability of a type I error (rejecting a true null hypothesis). The area in the tail or tails of a distribution (z - t - or ?2); in hypothesis testing you don't always have a two tailed distribution as in confidenc






31. Sample variance






32. A number that is used to describe a characteristic of a sample - such as a sample average - is called a __________.






33. Type of information - usually a property of characteristic of a person or thing that is measured or observed






34. Determine the location of the middle value of all the data values






35. Range - standard deviation and variance.






36. To divide the population into 2 or more non-overlapping subsets called strata






37. Mu; population mean






38. Type II error is measured






39. Statistics






40. The pattern of variation of data. The distribution may be described as symmetrical - positively skewed - or negatively skewed






41. Variable where the value is a number that results from a measurement process - also called numerical data






42. Capital sigma; summation






43. Double the answer from step 1 or step 2 (on whichever side your test statistics falls).






44. Type of bar graph that shows frequency distributions






45. Before they are arranged or analyzed - information or observations are called________.






46. Is a sample that has the pertinent characteristics of the population in the same proportion - as they are included in that population






47. Is the portion of the population that is selected for study






48. A method of data collection where the researcher selects a sample from the population and measures the variable of interest






49. A method in which each combination of people has an equal chance of being selected- the sample is representative of the population and is independent






50. A subset of the population- it's important to choose a sample at random to avoid bias in the results