The table shows a recent random sample of different tree species and whether or not they have been affected by a drought. At a 1% Level of Significance, test to see if whether a tree is affected the drought is dependent on species.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Question 3
Fir
Cedar
Total
Pine
Affected?/Type
158
61
47
50
Yes
160
124
142
426
No
221
171
192
584
Total
The table shows a recent random sample of different tree species and whether or not they have
been affected by a drought. At a 1% Level of Significance, test to see if whether a tree is affected by
the drought is dependent on species.
1. The hypotheses are :
He
O Ho:Trees species and drought effect are independent
Ha:Trees species and drought effect are dependent
O Ho:Trees species and drought effect are dependent
Ha:Trees species and drought effect are independent
er
Proctor
2. This is a
left right tailed test; d.f. =
two
3a. The STS (to 2 decimals) is x =
Zoom
3b. The P-value (to 3 decimals) =
4a. The decision at a - 1% is
• 18
O Do not reject Ho
ticipants
O Reject Ho
26
ttv
MacBook Air
F2
F3
F4
F7
F8
F9
@
%23
%24
4.
%
&
*
3
5
6
E
R
T
Y
61
Transcribed Image Text:Question 3 Fir Cedar Total Pine Affected?/Type 158 61 47 50 Yes 160 124 142 426 No 221 171 192 584 Total The table shows a recent random sample of different tree species and whether or not they have been affected by a drought. At a 1% Level of Significance, test to see if whether a tree is affected by the drought is dependent on species. 1. The hypotheses are : He O Ho:Trees species and drought effect are independent Ha:Trees species and drought effect are dependent O Ho:Trees species and drought effect are dependent Ha:Trees species and drought effect are independent er Proctor 2. This is a left right tailed test; d.f. = two 3a. The STS (to 2 decimals) is x = Zoom 3b. The P-value (to 3 decimals) = 4a. The decision at a - 1% is • 18 O Do not reject Ho ticipants O Reject Ho 26 ttv MacBook Air F2 F3 F4 F7 F8 F9 @ %23 %24 4. % & * 3 5 6 E R T Y 61
4b. The conclusion is
O There is sufficient evidence to conclude that tree species and drought effect are dependent
O There is insufficient evidence to conclude that tree species and drought effect are dependent
O There is sufficient evidence to conclude that tree species and drought effect are independent
There is insufficient evidence to conclude that tree species and drought effect are
independent
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Transcribed Image Text:4b. The conclusion is O There is sufficient evidence to conclude that tree species and drought effect are dependent O There is insufficient evidence to conclude that tree species and drought effect are dependent O There is sufficient evidence to conclude that tree species and drought effect are independent There is insufficient evidence to conclude that tree species and drought effect are independent Submit Question
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