Question

A student measured the volume of gas produced in 30 seconds from a

reaction between 2g of magnesium and 20cm' of 2 mol/dm hydrochloric
acid. The student repeated the experiment 5 times and the volumes
collected (cm) were: 13.5, 13.1. 17.5, 13.7 and 13.0. Calculate the mean,
discounting any anomalies.

Answer 1

Observation = 13.5, 13.1, 17.5, 13.7, 13.0

and the Mean is: 14.16

Answer 2

`\boxed{Mean = 14.16}`

Explanation:

Observation = 13.5, 13.1, 17.5, 13.7, 13.0

No. of Observations = 5

=> Mean =
`(SumOfObservations)/(NumberOfObservations)`

=> Mean =
`(13.5+13.1+17.5+13.7+13.0)/(5)`

=> Mean =
`(70.8)/(5)`

=> Mean = 14.16