The following data come from a census of desert birds.
(A) Using these data, calculate the following: arithmetic mean; standard deviation; variance; standard error of the mean; and coefficient of variation.
(B) Which species of bird has the median species count?
(C) Which species of bird have the 25th and 75th percentile counts (or have the counts closest to these percentiles)?
|
Species
|
Count
|
|
Black Vulture
|
64
|
|
Turkey Vulture
|
23
|
|
Harris's Hawk
|
3
|
|
Red-tailed Hawk
|
16
|
|
American Kestrel
|
7
|
|
Gambel's Quail
|
148
|
|
Rock Dove
|
7
|
|
White-winged Dove
|
625
|
|
Mourning Dove
|
135
|
|
Greater Roadrunner
|
1
|
|
Great Horned Owl
|
2
|
|
Lesser Nighthawk
|
25
|
|
Black-chin. Hummingbird
|
1
|
|
Costa's Hummingbird
|
2
|
|
Gila Woodpecker
|
300
|
|
Ladder-back. Woodpecker
|
15
|
|
Gilded Flicker C
|
77
|
|
Ash-throated Flycatcher
|
173
|
|
Brown-crest. Flycatcher
|
128
|
|
Western Kingbird
|
1
|
|
Loggerhead Shrike
|
3
|
|
Bell's Vireo
|
10
|
|
Common Raven
|
12
|
|
Purple Martin
|
33
|
|
Violet-green Swallow
|
23
|
|
Verdin
|
282
|
|
Cactus Wren
|
230
|
|
Canyon Wren
|
2
|
|
Black-tail. Gnatcatcher
|
152
|
|
Northern Mockingbird
|
5
|
|
Curve-billed Thrasher
|
173
|
|
Phainopepla
|
18
|
|
Lucy's Warbler
|
67
|
|
Canyon Towhee
|
2
|
|
Black-throated Sparrow
|
33
|
|
Northern Cardinal
|
13
|
|
Great-tailed Grackle
|
1
|
|
Bronzed Cowbird
|
1
|
|
Brown-headed Cowbird
|
59
|
|
Hooded Oriole
|
4
|
|
Scott's Oriole
|
28
|
|
House Finch
|
297
|
|
House Sparrow
|
14
|