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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. Mu; population mean






2. Sample standard deviation






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






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






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






6. Occur when one does not affect the probability of the occurrence of the other.






7. Members of the population select themselves by volunteering






8. 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






9. Lowercase sigma; population standard deviaition






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






11. To find the range subtract the lowest value by the highest value.






12. Range - standard deviation and variance.






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






14. Test use normalcdf(ZTS -999)






15. Is the process of selecting a portion - or sample - of the entire population






16. One extreme value can affect it dramatically.






17. 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






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






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






20. Sample variance






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






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






23. 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






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






25. 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






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






27. Type II error is measured






28. 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).






29. Population size






30. Sample proportion






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






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






33. Sample size or number of trials






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






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






36. Population proportion






37. A flaw in the sampling procedure that makes it more likely that the sample will NOT be representative of population






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






39. A method of experimentation in which you can control as many variables as possible in order to isolate the effects of a response variable






40. The number of times each data value occurs






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






42. Sample mean






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






44. _______________ of a numerical variable represents the data values of the variable from the lowest to the highest value along with the number of times each data value occurs






45. Type of bar graph that shows frequency distributions






46. Involves the procedures associated with the data collection process - the summarizing and interpretation of data - and the drawing of inferences or conclusions based on the analysis of the data






47. Information about individuals in a population






48. Capital sigma; summation






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






50. Collection of information from a sample