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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. Graph involving pictures of objects in which the size of the object in which the size of the object in the picture represents the relative size of the quantity being represented by the object.






2. Standard scores and percentile






3. Is a sample containing similar characteristics of the population






4. Is the process of using SAMPLE INFORMATION to draw inferences or conclusions about the POPULATION






5. Collection of information from a sample






6. Range - standard deviation and variance.






7. Members of the population select themselves by volunteering






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






9. The variable value can be represented as isolated points on a number line






10. Type II error is measured






11. Type of bar graph that shows frequency distributions






12. Mean - mode - median and midrange.






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






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






15. Level of measurement- Is like the ordinal level - with the additional property that we can determine meaningful amounts of differences between data. However - there is no inherent (natural) zero starting point (where none of the quantity is present).






16. 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






17. One extreme value can affect it dramatically.






18. Represents categories - and is nonnumerical in nature






19. A collection of individuals about which we want to draw conclusions






20. Probability of event A






21. Capital sigma; summation






22. 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






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






24. (largest data value) - (smallest data value)






25. Disjoint events cannot overlap. They are mutually exclusive if they cannot occur at the same time.






26. Sample variance






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






28. Is denoted by 'n' - is the number of data values in the sample






29. _______________ are numerical values that can assume only a limited number of 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. A method of data collection in which the objects of study are observed in their natural settings and the variables are recorded






32. A descriptive tool used to visually describe the characteristics and relationships of collections of data quickly and attractively






33. Is a collection of several data pertaining to one or more variables






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






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






36. A sample which is selected in such a manner - that each data value of the population has a non-zero probability of being selected for the sample






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






38. The number of times each data value occurs






39. Population proportion






40. Using graphs and numerical summaries to describe variables in a data set and their relationship






41. Always use a equal symbol






42. A survey that includes every item or individual of the population






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






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






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






46. Complement of p






47. To calculate the percentile take the number of values less than x - divide by total number of values and times by 100.






48. Is a sample of data values selected from a population in such a way that every sample of size 'n' has an equal probability of being selected and every data value of the population has the same chance of being selected for the sample






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






50. Can be used to get an initial graphical view of data