Hi Folks,
Bit puzzled by the below problem on how to solve. Appreciate tips / assistance.
Many thanks,
The height of some newly planted Cypress pine trees and Plum pines was recorded in
2019. The average height of these trees was 180cm, and the standard deviation was
6.5cm. A Cypress Pine was 186.5 cm tall, which was 1 standard deviation above the
mean. The Plum pine measured was 2 standard deviations below the mean.
The same pine trees were measured a year later. The mean of these trees has remained
the same, but the standard deviation reduced by 2 cm. If the relative position of the Plum
pine is the same, calculate by how much it had grown in 2020.
Bit puzzled by the below problem on how to solve. Appreciate tips / assistance.
Many thanks,
The height of some newly planted Cypress pine trees and Plum pines was recorded in
2019. The average height of these trees was 180cm, and the standard deviation was
6.5cm. A Cypress Pine was 186.5 cm tall, which was 1 standard deviation above the
mean. The Plum pine measured was 2 standard deviations below the mean.
The same pine trees were measured a year later. The mean of these trees has remained
the same, but the standard deviation reduced by 2 cm. If the relative position of the Plum
pine is the same, calculate by how much it had grown in 2020.