A computer scanner can read a bar code on a package correctly 97% of the time

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A computer scanner can read a bar code on a package correctly 97% of the time. One company monitors the accuracy of the scanner by randomly sampling packages and verifying that each package has been correctly scanned. Random samples of size n = 25, 50, 100, and 200 have recently been taken with the following results.

 

Sample Size, n	Number Correctly Scanned
25	24
50	49
100	95
200	193

 

 

To complete this activity, use Excel to:

 

1. Calculate the sample proportion for each sample size. 

2. Calculate the single-proportion sampling error for each sample size. 

3. Calculate the probability of finding 198 correctly scanned packages, for a sample of size n=200. 

4. Submit your work Excel file.