Statistics

~ Exam ~

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This test has 40 questions.

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1. This problem is for questions 1-5. You have 13,20,14,45,60. The mean is ____.

  a. 40.4

  b. 20.0

  c. 56.1

  d. 30.4


2. The median is ___.

  a. 21

  b. 24

  c. 13

  d. 20


3. The sum is ___

  a. 20

  b. 152

  c. 151

  d. 135


4. The n is ___.

  a. 4

  b. 2

  c. 3

  d. 5


5. The range is __.

  a. 48

  b. 61

  c. 47

  d. 37


6. Homicide data (death/100.000) is ___ data.

  a. nominal

  b. continuous

  c. ordinal

  d. categorical


7. High school graduation (yes/no) is ___ data.

  a. binary

  b. ordinal

  c. nominal

  d. continuous


8. Smoking status is (none, light, heavy) is ___ data.

  a. continuous

  b. dichotomous

  c. none of the others

  d. ordinal


9. A frequency distribution positively skewed is skewed ___.

  a. to the left

  b. bell shaped

  c. to the right

  d. with two peaks


10. In a normal distribution, ______________.

  a. the mean will equal the median

  b. the distribution will be symmetrical

  c. the mean will be larger than the median

  d. a and b


11. When the sample size increases, the ______ will generally remain the same.

  a. SD

  b. maximum

  c. mean

  d. a and c


12. 95% of all observations fall within ___ SD.

  a. 1

  b. 3

  c. 4

  d. 2


13. the p value is always between ___.

  a. 0 and 2

  b. 1 and 2

  c. 0 and 1

  d. 0 and .99


14. Compare one group of binomials to hypothetical value with __.

  a. r

  b. t-test

  c. ANOVA

  d. chi-square


15. Compare two groups with ___.

  a. chi-square

  b. r

  c. t-test

  d. ANOVA


16. Compare three or more groups with _____.

  a. chi-square

  b. ANOVA

  c. correlation

  d. t-test


17. Qualify the association between 2 variables with ___.

  a. correlation

  b. chi-square

  c. t-test

  d. ANOVA


18. The data for the next 14 questions are 72,84,95,77,89,70,83. The mean is ___.

  a. 75.96

  b. 86.05

  c. 65.84

  d. 81.43


19. The SD is ____.

  a. 42

  b. 12.5

  c. 9.03

  d. 14.5


20. The minimum is _____.

  a. 70.00

  b. 16.69

  c. 66.00

  d. 17.45


21. The range is ___.

  a. 25

  b. 65

  c. 31

  d. 36


22. The n is ____.

  a. 5

  b. 6

  c. 7

  d. 8


23. The median is _____.

  a. 11

  b. 85

  c. 83

  d. 98


24. The mode is _____.

  a. all 7 numbers

  b. the highest 3 numbers

  c. the highest number

  d. 95


25. The variance is _____.

  a. 58.88

  b. 75.77

  c. 86.55

  d. 81.62


26. The mid-range _____.

  a. 70.5

  b. 82.5

  c. 55.8

  d. 80.4


27. The maximum is _____.

  a. 30.2

  b. 95.0

  c. 20.4

  d. 14.5


28. The Q1 is -->_____.

  a. 96

  b. 72

  c. 58

  d. 49


29. The sum is _____.

  a. 444

  b. 570

  c. 552

  d. 745


30. The Standard Error of Mean is _____.

  a. 3.622

  b. 2.734

  c. 5.843

  d. 3.415


31. The skewness is _____.

  a. .1213

  b. .2455

  c. .1422

  d. .3821


32. For items 32 to 38, the numbers are 345, 765, 876, 134, 598. n= _____.

  a. 3

  b. 4

  c. 5

  d. 6


33. The mean is________.

  a. 543.6

  b. 644.2

  c. 523.4

  d. 755.8


34. The median is _____.

  a. 555

  b. 645

  c. 598

  d. 643


35. The SD is _____.

  a. 344..5

  b. 278.6

  c. 304.1

  d. 412.3


36. The variance is ______.

  a. 563

  b. 9333.4

  c. 89342.5

  d. 92420.3


37. The t-test is _____.

  a. 0.22

  b. 0.32

  c. .39

  d. .37


38. If the mean is 500 and the hypothesized mean 450, the SD 300 and n=5, using .05 level of significance, the hypothetical value is _____. (The same number values go for question 38-40)

  a. not accepted

  b. accepted

  c. maybe accepted

  d. may not be accepted


39. The 95% confidence interval of an upper limit of the sample mean is _____.

  a. 872.44

  b. 822.3

  c. 785.6

  d. 955.6


40. The 95% lower limit of the confidence interval of a sample mean is _____.

  a. 244.5

  b. 127.56

  c. 113.6

  d. 178.8