Question

The manager of the help-line at a local software manufacturing firm collected data on the number of calls the help desk received per shift for the last 100 days. The data is summarized in the table below. What is the estimated mean number of calls per night? # of Calls: 80 but < 120, 120 but < 160, 160 but < 200, 200 but < 240, 240 but < 280, 280 but < 320 # of Days: 1, 21, 29, 32, 15, 2

          The manager of the help-line at a local software manufacturing firm collected data on the number of calls the help desk received per shift for the last 100 days. The data is summarized in the table below.

What is the estimated mean number of calls per night?

# of Calls: 80 but < 120, 120 but < 160, 160 but < 200, 200 but < 240, 240 but < 280, 280 but < 320
# of Days: 1, 21, 29, 32, 15, 2

The manager of the help-line at a local software manufacturing firm collected data on the number of calls the help desk received per shift for the last 100 days. The data is summarized in the table below.

What is the estimated mean number of calls per night?

# of Calls: 80 but < 120, 120 but < 160, 160 but < 200, 200 but < 240, 240 but < 280, 280 but < 320
# of Days: 1, 21, 29, 32, 15, 2

Added by Jillian M.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert David Nguyen

01/14/2022

Step 1

Step 1: Calculate the midpoints of each interval: - Midpoint of 80-120: (80 + 120) / 2 = 100 - Midpoint of 120-160: (120 + 160) / 2 = 140 - Midpoint of 160-200: (160 + 200) / 2 = 180 - Midpoint of 200-240: (200 + 240) / 2 = 220 - Midpoint of 240-280: (240 + 280) / Show more…

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The manager of the help-line at a local software manufacturing firm collected data on the number of calls the help desk received per shift for the last 100 days. The data is summarized in the table below: