What would be a confidence interval for an additional sample of mower test performance an in the worksheet Mower Test?

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Performance Lawn Equipment

What proportion of customers rate the company with “top box” survey responses (which is defined as scale levels 4 and 5) on quality, ease of use, price, and service in the 2012 Customer Survey worksheet? How do these proportions differ by geographic region?

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2 Dealer Satisfaction
3 End-User Satisfaction
4 2014 Customer Survey

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What would be a confidence interval for an additional sample of mower test performance an in the worksheet Mower Test?

For the data in the worksheet Blade Weight, what is the sampling distribution of the mean, the overall mean, and the standard error of the mean? Is a normal distribution an appropriate assumption for the sampling distribution of the mean?

How many blade weights must be measured to find a 95% confidence interval for the mean blade weight with a sampling error of at most 0.2? What if the sampling error is specified as 0.1?

Dealer Satisfaction

Dealer Satisfaction
Survey Scale: 0 1 2 3 4 5 Sample
North America Size
2010 1 0 2 14 22 11 50
2011 0 0 2 14 20 14 50
2012 1 1 1 8 34 15 60
2013 1 2 6 12 34 45 100
2014 2 3 5 15 44 56 125
South America
2010 0 0 0 2 6 2 10
2011 0 0 0 2 6 2 10
2012 0 0 1 4 11 14 30
2013 0 1 1 3 12 33 50
2014 1 1 2 4 22 60 90
Europe
2010 0 0 1 3 7 4 15
2011 0 0 1 2 8 4 15
2012 0 0 1 2 15 7 25
2013 0 0 1 2 21 6 30
2014 0 0 1 4 17 8 30
Pacific Rim
2010 0 0 1 2 2 0 5
2011 0 0 1 1 3 0 5
2012 0 0 1 1 3 1 6
2013 0 0 0 2 5 3 10
2014 0 0 1 2 7 2 12
China
2012 0 0 0 1 0 0 1
2013 0 0 1 4 2 0 7
2014 0 0 1 5 8 2 16

End-User Satisfaction

End-User Satisfaction
Sample
North America 0 1 2 3 4 5 Size
2010 1 3 6 15 37 38 100
2011 1 2 4 18 35 40 100
2012 1 2 5 17 34 41 100
2013 0 2 4 15 33 46 100
2014 0 2 3 15 31 49 100
South America
2010 1 2 5 18 36 38 100
2011 1 3 6 17 36 37 100
2012 0 2 6 19 37 36 100
2013 0 2 5 20 37 36 100
2014 0 2 5 19 37 37 100
Europe
2010 1 2 4 21 36 36 100
2011 1 2 5 21 34 37 100
2012 1 1 4 26 37 31 100
2013 1 1 3 17 41 37 100
2014 0 1 2 19 45 33 100
Pacific Rim
2010 2 3 5 15 41 34 100
2011 1 2 7 15 41 34 100
2012 1 2 5 16 40 36 100
2013 0 2 4 17 40 37 100
2014 0 1 3 19 42 35 100
China
2012 0 3 3 6 28 10 50
2013 1 2 2 4 30 11 50
2014 0 1 1 3 31 14 50

2014 Customer Survey

2014 Customer Survey
Region Quality Ease of Use Price Service
NA 4 1 3 4
NA 4 4 4 5
NA 4 5 4 3
NA 5 4 4 4
NA 5 4 5 4
NA 5 5 3 5
NA 5 4 4 2
NA 5 5 4 5
NA 4 4 4 5
NA 4 5 4 5
NA 4 5 1 4
NA 5 5 4 4
NA 5 4 3 3
NA 4 5 4 4
NA 5 4 3 5
NA 5 5 2 5
NA 5 4 2 5
NA 5 4 2 5
NA 4 5 4 4
NA 4 4 5 4
NA 4 4 2 4
NA 4 3 3 4
NA 5 5 2 5
NA 5 3 4 3
NA 5 4 4 5
NA 5 5 2 5
NA 5 5 5 3
NA 4 4 5 4
NA 5 4 4 4
NA 5 1 5 5
NA 5 4 3 5
NA 4 5 1 4
NA 4 4 3 5
NA 5 3 4 4
NA 5 5 2 4
NA 5 4 4 4
NA 5 5 4 4
NA 5 5 4 5
NA 4 3 3 5
NA 5 4 4 3
NA 5 4 3 4
NA 5 5 1 5
NA 5 4 5 4
NA 3 4 3 4
NA 5 4 2 4
NA 5 5 4 5
NA 5 5 3 4
NA 5 4 4 4
NA 5 4 4 4
NA 5 4 4 5
NA 5 4 1 4
NA 5 4 5 5
NA 5 5 3 4
NA 5 4 4 5
NA 4 3 5 5
NA 5 4 4 4
NA 5 5 5 5
NA 5 5 4 5
NA 4 4 4 4
NA 5 4 5 5
NA 4 5 5 4
NA 5 5 5 4
NA 5 5 3 5
NA 5 4 4 4
NA 5 4 5 2
NA 4 4 5 5
NA 4 4 4 5
NA 5 4 4 4
NA 5 4 3 5
NA 5 4 5 4
NA 5 5 4 5
NA 5 4 4 4
NA 5 4 5 2
NA 5 3 4 5
NA 5 4 5 5
NA 5 4 1 5
NA 4 5 3 5
NA 3 5 2 5
NA 5 5 4 4
NA 4 4 3 5
NA 3 2 4 5
NA 1 4 3 4
NA 4 5 3 5
NA 5 5 4 4
NA 4 5 5 5
NA 5 5 4 5
NA 5 5 4 4
NA 4 2 4 5
NA 5 4 5 4
NA 5 4 5 4
NA 5 5 4 3
NA 5 5 5 5
NA 4 5 5 3
NA 5 5 4 5
NA 4 4 5 5
NA 5 5 3 4
NA 4 5 2 4
NA 5 5 5 4
NA 4 5 4 3
NA 4 5 5 4
SA 5 4 3 5
SA 5 4 2 4
SA 5 4 5 5
SA 4 2 4 5
SA 5 4 4 5
SA 4 5 2 5
SA 5 4 4 4
SA 4 5 3 5
SA 4 4 4 3
SA 4 4 2 4
SA 5 4 3 4
SA 3 3 5 5
SA 5 4 3 4
SA 5 4 2 5
SA 4 4 3 4
SA 4 4 3 5
SA 1 5 3 4
SA 5 4 2 4
SA 4 4 4 4
SA 4 4 5 5
SA 5 4 2 4
SA 4 4 5 5
SA 4 4 4 3
SA 3 3 4 5
SA 5 4 4 4
SA 4 4 4 1
SA 4 5 5 5
SA 4 1 4 5
SA 4 5 4 4
SA 4 4 4 5
SA 5 4 3 4
SA 4 4 4 5
SA 5 5 4 3
SA 5 5 4 4
SA 4 4 2 4
SA 4 4 4 5
SA 5 4 4 5
SA 5 4 4 4
SA 5 4 1 4
SA 3 4 4 5
SA 4 3 5 4
SA 4 4 2 3
SA 5 4 3 3
SA 4 3 4 5
SA 5 3 5 5
SA 5 4 4 4
SA 5 4 4 4
SA 3 4 3 4
SA 4 4 1 4
SA 4 3 4 3
Eur 4 5 5 3
Eur 4 4 4 2
Eur 3 4 5 4
Eur 3 4 1 3
Eur 4 4 5 5
Eur 5 5 5 5
Eur 5 5 5 1
Eur 4 5 5 4
Eur 3 4 4 4
Eur 3 5 3 3
Eur 4 4 5 4
Eur 5 4 5 5
Eur 5 3 4 4
Eur 5 5 4 5
Eur 3 4 4 4
Eur 4 5 4 5
Eur 4 5 4 4
Eur 5 4 4 5
Eur 4 5 4 4
Eur 3 5 3 4
Eur 4 4 4 2
Eur 5 5 3 4
Eur 5 3 4 5
Eur 4 5 2 4
Eur 4 3 4 4
Eur 5 4 3 3
Eur 2 4 4 4
Eur 5 4 5 4
Eur 4 5 4 3
Eur 5 4 1 5
Pac 5 4 4 5
Pac 5 5 5 5
Pac 4 4 4 4
Pac 4 3 4 4
Pac 5 4 5 4
Pac 4 4 4 4
Pac 5 5 4 5
Pac 4 2 3 3
Pac 3 4 4 4
Pac 5 4 4 5
China 5 5 4 4
China 5 5 4 3
China 4 4 3 3
China 4 4 3 3
China 4 4 3 2
China 4 4 3 3
China 4 4 3 2
China 3 4 3 3
China 3 4 2 2
China 2 3 2 1