The mean value of the frequency decreases with increasing amplitude.

I study English two hours a day on an average.

My work at school was well above average.

The average length is seven hours and forty-five minutes, not much different from what a lot of humans need.

She is almost as intelligent as an average human child.

On an average how many miles do you walk a day?

On an average, I go to the movies twice a month.

The expenses average ten dollars a day.

She earns on average ten pounds a week.

She reads on average three or four books a week.

He is of average height.

He walks seven miles a day on an average.

He studied ten hours a day on average.

He studies ten hours a day on average.

His ability in English is above average.

Japanese women marry at 26 on average. It is no mystery that the birthrate is declining.

Japanese women get married at 25 on average.

The Nikkei Stock Average lost nearly 200 points to close yesterday at 18,000.

Each year the world's population increases on average by two percent.

The graph in Figure 1 illustrates the differences in the means of total scores for white and black subject in each grade.