Question: Data was collected on Time in seconds to check in bags at the airport by an airline agent. Airline would like to see the average

  1. Data was collected on Time in seconds to check in bags at the airport by an airline agent. Airline would like to see the average check-in time to be between 200 and 220 seconds. Five samples were collected using sample size = 4 for Check-in Time in seconds as shown below. From the past data, the check-in process standard deviation has been observed to be 2 seconds.

Sample #

1

2

3

4

5

211

215

209

212

209

210

212

209

210

214

211

210

211

208

213

208

211

215

210

212

Sample Means

210

212

211

210

212

  1. Find the two sigma control limits and the Center Line for 95% Mean Control Chart for the Check-in Time process. Note: Samples Means are given.
  2. Find the CL and both the Limits for Mean Chart assuming the Check-in Time Process Standard deviation was unknown. (20 Pts)

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