7.34 12.18 8.14 15. 2, Σy- 59.83 , Σx 15,194, Σy2

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Wolf packs tend to be large extended family groups that have a well-defined hunting territory. Wolves not in the pack are driven out of the territory or killed. In ecologically similar regions,
is the size of an extended wolf pack related to size of hunting region? Using radio collars on wolves, the size of the hunting region can be estimated for a given pack of wolves. Let x
represent the number of wolves in an extended pack and y represent the size of the hunting region in km?/1000. The following data are representative of one of the national parks.
x wolves
y km²/1000
28
34
22
67
91
7.34
12.18
8.14
15.35
16.82
(a) Verify that Ex = 242, Ey = 59.83, Ex?
Ex
£y
Ex2
- 15,194, Ey2 = 787.0225, Exy = 3357.79, and r- 0.9287.
Exy
(b) Use a 1% level of significance to test the claim p > 0. (Use 2 decimal places.)
critical t
Conclusion
O Reject the null hypothesis, there is sufficient evidence that p > 0.
O Reject the null hypothesis, there is insufficient evidence that p > 0.
Fail to reject the null hypothesis, there is insufficient evidence that p > 0.
O Fail to reject the null hypothesis, there is sufficient evidence that p > 0.
(c) Verify that S. - 1.8054, a - 5.5424, and b - 0.13272.
Se
(d) Find the predicted size of the hunting region for an extended pack of 73 wolves. (Use 2 decimal places.)
| km2/1000
(e) Find an 85% confidence interval for your prediction of part (d). (Use 1 decimal place.)
| km²/1000
| km²/1000
lower limit
upper limit
(F) Use a 1% level of significance to test the claim that B > 0. (Use 2 decimal places.)
critical t
Conclusion
O Reject the null hypothesis, there is sufficient evidence that B > 0.
O Reject the null hypothesis, there is insufficient evidence that B > 0.
O Fail to reject the null hypothesis, there is insufficient evidence that B > 0.
O Fail to reject the null hypothesis, there is sufficient evidence that B > 0.
(9) Find a 95% confidence interval for ß and interpret its meaning in terms of drift rate. (Use 2 decimal places.)
lower limit
upper limit
Interpretation
For every wolf joining the pack, the hunting territory decreases by an amount that falls outside the confidence interval.
For every wolf joining the pack, the hunting territory increases by an amount that falls within the confidence interval.
For every wolf joining the pack, the hunting territory decreases by an amount that falls within the confidence interval.
O For every wolf joining the pack, the hunting territory increases by an amount that falls outside the confidence interval.
อผู้ด
Transcribed Image Text:Wolf packs tend to be large extended family groups that have a well-defined hunting territory. Wolves not in the pack are driven out of the territory or killed. In ecologically similar regions, is the size of an extended wolf pack related to size of hunting region? Using radio collars on wolves, the size of the hunting region can be estimated for a given pack of wolves. Let x represent the number of wolves in an extended pack and y represent the size of the hunting region in km?/1000. The following data are representative of one of the national parks. x wolves y km²/1000 28 34 22 67 91 7.34 12.18 8.14 15.35 16.82 (a) Verify that Ex = 242, Ey = 59.83, Ex? Ex £y Ex2 - 15,194, Ey2 = 787.0225, Exy = 3357.79, and r- 0.9287. Exy (b) Use a 1% level of significance to test the claim p > 0. (Use 2 decimal places.) critical t Conclusion O Reject the null hypothesis, there is sufficient evidence that p > 0. O Reject the null hypothesis, there is insufficient evidence that p > 0. Fail to reject the null hypothesis, there is insufficient evidence that p > 0. O Fail to reject the null hypothesis, there is sufficient evidence that p > 0. (c) Verify that S. - 1.8054, a - 5.5424, and b - 0.13272. Se (d) Find the predicted size of the hunting region for an extended pack of 73 wolves. (Use 2 decimal places.) | km2/1000 (e) Find an 85% confidence interval for your prediction of part (d). (Use 1 decimal place.) | km²/1000 | km²/1000 lower limit upper limit (F) Use a 1% level of significance to test the claim that B > 0. (Use 2 decimal places.) critical t Conclusion O Reject the null hypothesis, there is sufficient evidence that B > 0. O Reject the null hypothesis, there is insufficient evidence that B > 0. O Fail to reject the null hypothesis, there is insufficient evidence that B > 0. O Fail to reject the null hypothesis, there is sufficient evidence that B > 0. (9) Find a 95% confidence interval for ß and interpret its meaning in terms of drift rate. (Use 2 decimal places.) lower limit upper limit Interpretation For every wolf joining the pack, the hunting territory decreases by an amount that falls outside the confidence interval. For every wolf joining the pack, the hunting territory increases by an amount that falls within the confidence interval. For every wolf joining the pack, the hunting territory decreases by an amount that falls within the confidence interval. O For every wolf joining the pack, the hunting territory increases by an amount that falls outside the confidence interval. อผู้ด
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