Week 6 Assignment Sampling Distribution

Week 6 Activity

• Sampling Distribution

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.