Quantitative Investigations of Variation
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Question 1 of 73
1. Question
What is random sampling?
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Question 2 of 73
2. Question
What is a habitat?
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Question 3 of 73
3. Question
What is systematic sampling?
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Question 4 of 73
4. Question
What is opportunistic sampling?
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Question 5 of 73
5. Question
What is stratified sampling?
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Question 6 of 73
6. Question
What is a quadrat?
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Question 7 of 73
7. Question
What is used to place a quadrat accurately?
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Question 8 of 73
8. Question
What are used with quadrats to make them more accurate?
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Question 9 of 73
9. Question
What can be used to measure percentage cover?
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Question 10 of 73
10. Question
What is a transect?
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Question 11 of 73
11. Question
What is an interrupted belt transect?
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Question 12 of 73
12. Question
What data does the use of a quadrat give?
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Question 13 of 73
13. Question
What is a point frame?
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Question 14 of 73
14. Question
How might placing a quadrat disturb a habitat?
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Question 15 of 73
15. Question
How can large plants be counted?
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Question 16 of 73
16. Question
When would a line transect be used?
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Question 17 of 73
17. Question
Which of the following is not a reason why it can be hard to count animals?
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Question 18 of 73
18. Question
How can the presence of larger animals be identified?
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Question 19 of 73
19. Question
Which of the following techniques can be used to detemine population size?
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Question 20 of 73
20. Question
Which of these is not a way ecologists catch invertebrates?
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Question 21 of 73
21. Question
Which of the following is used to trap small mammals?
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Question 22 of 73
22. Question
How is total population from a sample of small animals calculated?
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Question 23 of 73
23. Question
How is the ‘sweep net’ technique carried out?
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Question 24 of 73
24. Question
What is a pooter used for?
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Question 25 of 73
25. Question
Where are pitfall traps used?
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Question 26 of 73
26. Question
What does a Tullgreen funnel collect?
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Question 27 of 73
27. Question
What trap is used to catch flying insects at night?
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Question 28 of 73
28. Question
How would a sample be taken from under a hedge?
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Question 29 of 73
29. Question
How could you mark a small mammal, without causing harm?
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Question 30 of 73
30. Question
What is the correlation coefficient?
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Question 31 of 73
31. Question
What is the standard deviation?
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Question 32 of 73
32. Question
What is a ttest used for?
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Question 33 of 73
33. Question
What does a low standard deviation indicate?
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Question 34 of 73
34. Question
What does a high standard deviation indicate?
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Question 35 of 73
35. Question
In the following equation, what does xÌ… stand for? [Zoie – paste in the equation to the right]
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Question 36 of 73
36. Question
What is the standard deviation of the following data? Length of leaf (mm) â€“ 83, 84, 88, 75, 97, 86, 92, 87, 65, 8
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Question 37 of 73
37. Question
What are the degrees of freedom?
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Question 38 of 73
38. Question
How do you find the degrees of freedom?
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Question 39 of 73
39. Question
What significance level is used in biology?
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Question 40 of 73
40. Question
If the calculated value from a ttest is greater than the value at 5%, what is the difference in data sets considered as?
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Question 41 of 73
41. Question
If the calculated value from a ttest is less than the value at 5%, what is the difference in data sets considered as?
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Question 42 of 73
42. Question
If the difference between two data sets is significant, what do we do with the null hypothesis?
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Question 43 of 73
43. Question
If the difference between two data sets is insignificant, what do we do with the null hypothesis?
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Question 44 of 73
44. Question
What does the null hypothesis of a ttest state?
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Question 45 of 73
45. Question
Anything outside of the 95% distribution is considered what?
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Question 46 of 73
46. Question
How is the mean found?
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Question 47 of 73
47. Question
Why would the mode be used instead of the mean as an average?
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Question 48 of 73
48. Question
What does a correlation coefficient of 1 indicate?
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Question 49 of 73
49. Question
Which of the following is correct in a positively skewed distribution?
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Question 50 of 73
50. Question
The positive square root of the mean of the squares of deviations of value from their mean is:
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Question 51 of 73
51. Question
Mean deviation,Variance and Standard deviation of the values 4,4,4,4,4,4 is ______
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Question 52 of 73
52. Question
Sample mean is an:
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Question 53 of 73
53. Question
Which of the following is not affected by extreme values:
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Question 54 of 73
54. Question
The median divides the data into_____ equal parts:
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Question 55 of 73
55. Question
If the arithmetic mean of 20 values is 10, then sum of these 20 values is:
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Question 56 of 73
56. Question
Which of the following is not based upon all the observations?
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Question 57 of 73
57. Question
Ten families have an average of 2 boys. How many boys do they have together?
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Question 58 of 73
58. Question
The sum of squared deviation is minimum,when deviation are taken from
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Question 59 of 73
59. Question
If the arithmetic mean of the two numbers X1 and X2 is 5 if X1=3, then X2 is:
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Question 60 of 73
60. Question
Lowest value of Variance can be______?
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Question 61 of 73
61. Question
In symmetrical distribution Mean,Median and Mode are always:
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Question 62 of 73
62. Question
The Mean deviation of the values, 18,12,15, is _____?
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Question 63 of 73
63. Question
For negatively Skewed distribution Mean______Median______Mode.
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Question 64 of 73
64. Question
What is the absolute difference of mean and mode of 1,2,4,6,18,21,18 ?
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Question 65 of 73
65. Question
The Mode of 12,17,16,14,13,16,11 14 is______?
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Question 66 of 73
66. Question
If Y= 8X5 and S.D of X=3 then standard deviation of Y______?
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Question 67 of 73
67. Question
The Mean of the absolute deviations of observations from Mean,Median or Mode is known as
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Question 68 of 73
68. Question
The sum of square of deviations of the observations from their Mean is______?
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Question 69 of 73
69. Question
The number which occurs most frequently in a set of numbers is ______?
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Question 70 of 73
70. Question
The median of 7,6,4,8,2,5,11 is______?
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Question 71 of 73
71. Question
The variance of 5 numbers is 10.If each number is divided by 2, then variance of new number is ______?
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Question 72 of 73
72. Question
Mean deviation is always:
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Question 73 of 73
73. Question
If the standard deviation of the values 2,4,6,8 is 2.33 then the standard deviation of the values 4,6,8,10 is _____?
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