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#1 2016-02-06 09:35:56
- sassytonigirl
- Member
- Registered: 2016-01-24
- Posts: 49
Elementary statistics set 3
10.
For a sample of eight bears, researchers measured the distances around the bears' chests and weighed the bears. Minitab was used to find that the value of the linear correlation coefficient is r=0.889. Using α=0.05, determine if there is a linear correlation between chest size and weight. What proportion of the variation in weight can be explained by the linear relationship between weight and chest size?
a. Is there a linear correlation between chest size and weight?
A. Yes, because the absolute value of the test statistic exceeds the critical value of 0.707.
B. No, because the absolute value of the test statistic exceeds the critical value of 0.707.
C. Yes, because the test statistic falls between the critical values of −0.707 and 0.707.
D. The answer cannot be determined from the given information.
b. What proportion of the variation in weight can be explained by the linear relationship between weight and chest size?
___________(Round to three decimal places as needed.)
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#2 2016-02-07 16:05:53
- sassytonigirl
- Member
- Registered: 2016-01-24
- Posts: 49
Re: Elementary statistics set 3
#10
a. A.- Yes, because the absolute value of the test statistic exceed the critical value of 0.707
b. 0.790
let me know if you get something different. All of this stuff runs together and confuses me!
Thanks
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#3 2016-02-07 17:33:55
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Elementary statistics set 3
10 a is fine.
10 b is okay too.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#4 2016-02-07 17:58:34
- sassytonigirl
- Member
- Registered: 2016-01-24
- Posts: 49
Re: Elementary statistics set 3
Thank you!
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#5 2016-02-08 02:51:03
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Elementary statistics set 3
You are welcome, I have to get off line for a while because I am having trouble with a leak in the ceiling. They can not fix it so I am moving to a different apartment. Will be back later.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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