Question

Suppose Charlene Brewster has timesâ (in seconds) of 8.5â, 8.5â, 8.3â, 8.6â, 8.7â, 8.4 and a performance rating of 85â%.

The normal time for this operationâ = _____ seconds â(round your response to two decimalâ places).
Based on the normal time and the observedâ times, Charlene's work performance should be rated as ______

Answer 1

1. 10s

2. Slower than normal

Step-by-step explanation:

1. To calculate the normal time, we first take the average of Charlene's observed times:

Average of Charlene's observed time =
`((8.5+8.5+8.3+8.6+8.7+8.4))/(6)`= 8.5s

Her normal time is therefore:
`(Average of Charlene's observed time)/(performance rating)` =
`(8.5)/(0.85)` = 10s

2. Since no of Charlene's observed time is higher than normal time of 10s, we can therefore conclude that her work perfomance should be rated as slower than normal.