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The two-way frequency table shows the results of a survey of a certain forest. Find the probability that a randomly chosen tree will be a California redwood tree taller than 300 ft. Round to the nearest thousandth. 

Trees in Forest

Height of 300 ft

California Redwoods Giant Sequoia Totals
Over 25 35 60
Under 280 270 550
Totals 305 305 610

 

 

A. 0.459

 

B. 0.082

 

C. 0.417

 

D. 0.041

 Apr 5, 2016

Best Answer 

 #3
avatar+129849 
+5

Look at the intersection of  the column "California Redwoods"  and the row "Over"

 

Notice that the entry = 25

 

So....the probability that we have a California Redwood over 300 =

 

25 / [total trees in sample]  =  25 / 610  = about 0.04098  = about  0 .041

 

 

 

cool cool cool

 Apr 5, 2016
 #3
avatar+129849 
+5
Best Answer

Look at the intersection of  the column "California Redwoods"  and the row "Over"

 

Notice that the entry = 25

 

So....the probability that we have a California Redwood over 300 =

 

25 / [total trees in sample]  =  25 / 610  = about 0.04098  = about  0 .041

 

 

 

cool cool cool

CPhill Apr 5, 2016
 #4
avatar+188 
0

THANK YOU AGAIN :)...is there any way you can stop the other person from posting innapropriate answers? Thanks.

Carpe♥Diem  Apr 5, 2016

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