MATH 399N Week 8 MyStatLab Final Exam Review
Version 20160311
, MATH 399N Week 8 MyStatLab Final Exam Review
You may want toPRINT THIS so you can carefully check your answers. Be sure toask
your instructor if you have questions about any of the solutions given below.
1. Determine if each of the following represents nominal, ordinal, interval, or ratio data.
a. Movie ratings
b. Test scores
c. Colors of shirts
Solution:(a) ordinal data since movie ratings have an order, but cannot be subtracted; (b) ratio
data since there is a real zero; (c) nominal data as there is not even order to these data.
2. Thefollowing numbersrepresenttheweights in poundsofsix 7- yearold childrenin
Mrs.Jones'2ndgradeclass.
{25,60,51,47,49,45}
Findthemean;median;mode;range;variance;standard deviation.
Solution:mean= 46.17
median= 48
modedoesnotexist range= 35.00
variance= 134.57
standarddeviation=11.60
3. Ifthevarianceis846,whatis thestandarddeviation?
Solution:standarddeviation= squarerootofvariance= sqrt(846)=
29.086
4. Ifwe havethefollowing data
34,38,22,21,29,37,40,41,22,20,49,47,20,31,34,66
Drawastemandleaf.Discusstheshapeofthedistribution.
Solution:
2| 219200
3| 48714
Version 20160311
Version 20160311
, MATH 399N Week 8 MyStatLab Final Exam Review
You may want toPRINT THIS so you can carefully check your answers. Be sure toask
your instructor if you have questions about any of the solutions given below.
1. Determine if each of the following represents nominal, ordinal, interval, or ratio data.
a. Movie ratings
b. Test scores
c. Colors of shirts
Solution:(a) ordinal data since movie ratings have an order, but cannot be subtracted; (b) ratio
data since there is a real zero; (c) nominal data as there is not even order to these data.
2. Thefollowing numbersrepresenttheweights in poundsofsix 7- yearold childrenin
Mrs.Jones'2ndgradeclass.
{25,60,51,47,49,45}
Findthemean;median;mode;range;variance;standard deviation.
Solution:mean= 46.17
median= 48
modedoesnotexist range= 35.00
variance= 134.57
standarddeviation=11.60
3. Ifthevarianceis846,whatis thestandarddeviation?
Solution:standarddeviation= squarerootofvariance= sqrt(846)=
29.086
4. Ifwe havethefollowing data
34,38,22,21,29,37,40,41,22,20,49,47,20,31,34,66
Drawastemandleaf.Discusstheshapeofthedistribution.
Solution:
2| 219200
3| 48714
Version 20160311
