Chapter 3, Section 3, Exercise 078 Saab Sales Saab, a Swedish car manufacturer,
ID: 3207018 • Letter: C
Question
Chapter 3, Section 3, Exercise 078 Saab Sales Saab, a Swedish car manufacturer, is interested in estimating average monthly sales in the US, using the following sales figures from a sample of five months 658 456 830, 696, 385 Use StatKey or other technology to construct a bootstrap distribution and then find a 95% confidence interval to estimate the average monthly sales in the United States. Click here to access StatKey. Round your answers to the nearest integer. The 95% confidence interval is to http://www.saabsunited.com/saab sales-dataExplanation / Answer
Result:
Saab Sales Saab, a Swedish car manufacturer, is interested in estimating average monthly sales in the US, using the following sales figures from a sample of five months:1 658, 456, 830, 696, 385 Use StatKey or other technology to construct a bootstrap distribution and then find a 95 % confidence interval to estimate the average monthly sales in the United States.
SPSS used
95 % confidence interval = (468.00, 742.00)
Descriptives
Statistic
Std. Error
Bootstrapa
Bias
Std. Error
95% Confidence Interval
Lower
Upper
VAR00001
Mean
605.00
81.338
-2.61
70.59
468.00
742.00
95% Confidence Interval for Mean
Lower Bound
379.17
Upper Bound
830.83
5% Trimmed Mean
604.72
-2.26
73.96
462.06
741.78
Median
658.00
-50.98
121.55
385.00
830.00
Variance
33079.000
-6164.472
11796.756
5386.800
51072.700
Std. Deviation
181.876
-22.557
39.160
73.395
225.993
Minimum
385
Maximum
830
Range
445
Interquartile Range
343
-65
85
101
445
Skewness
-.115
.913
.036
1.038
-2.121
2.104
Kurtosis
-1.746
2.000
1.210
2.779
-3.333
4.992
a. Unless otherwise noted, bootstrap results are based on 1000 bootstrap samples
Descriptives
Statistic
Std. Error
Bootstrapa
Bias
Std. Error
95% Confidence Interval
Lower
Upper
VAR00001
Mean
605.00
81.338
-2.61
70.59
468.00
742.00
95% Confidence Interval for Mean
Lower Bound
379.17
Upper Bound
830.83
5% Trimmed Mean
604.72
-2.26
73.96
462.06
741.78
Median
658.00
-50.98
121.55
385.00
830.00
Variance
33079.000
-6164.472
11796.756
5386.800
51072.700
Std. Deviation
181.876
-22.557
39.160
73.395
225.993
Minimum
385
Maximum
830
Range
445
Interquartile Range
343
-65
85
101
445
Skewness
-.115
.913
.036
1.038
-2.121
2.104
Kurtosis
-1.746
2.000
1.210
2.779
-3.333
4.992
a. Unless otherwise noted, bootstrap results are based on 1000 bootstrap samples
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