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below is the link to the data https://1drv.ms/x/s!Asly5-Ugw961ccH1_jnvfpflMc8 In

ID: 3233233 • Letter: B

Question

below is the link to the data

https://1drv.ms/x/s!Asly5-Ugw961ccH1_jnvfpflMc8

Instructions: Answer the following questions based on the information contained in the dataset: classData.xls. Microsoft Excel will be necessary to complete your project, however, you could use any other type of statistical software. The data source is the National Longitudinal Survey of Youth (NLSY 79) from the Bureau of Labor Statistics, and variable descriptions are as follow: Variable description: 1. yearn: yearly earnings data for each individual and for each year. 2. hwrk: Total number of hours worked in each year (for each individual). 3. ysch: Years of schooling (highest grade completed) in every year. 4. age: Age of each respondent in every year. 5. chever: If respondent ever had any child. 6. nchgl8: number(s) of children with age>=18 7. nchll8: number(s) of children with age

Explanation / Answer

1)

2)

3)

In case of 99% confidence interval, it contains the population mean earnings of $9000 and hence, we cannot reject the null hypothesis whereas in 95% confidence interval, we can


yearn Mean 8314.07724 Standard Error 349.1334782 Median 3300 Mode 0 Standard Deviation 38841.78594 Sample Variance 1508684335 Kurtosis 10100.03453 Skewness 95.63622013 Range 4115087 Minimum 0 Maximum 4115087 Sum 102903334 Count 12377 Largest(1) 4115087 Smallest(1) 0 Confidence Level(95.0%) 684.3559725 LCL 7629.721268 UCL 8998.433213

2)

yearn Mean 8314.07724 Standard Error 349.1334782 Median 3300 Mode 0 Standard Deviation 38841.78594 Sample Variance 1508684335 Kurtosis 10100.03453 Skewness 95.63622013 Range 4115087 Minimum 0 Maximum 4115087 Sum 102903334 Count 12377 Largest(1) 4115087 Smallest(1) 0 Confidence Level(99.0%) 899.4469625 LCL 7414.630278 UCL 9213.524203

3)

In case of 99% confidence interval, it contains the population mean earnings of $9000 and hence, we cannot reject the null hypothesis whereas in 95% confidence interval, we can