Assignment for Analysis of Variance and Regression

Jade Huynh – 102111784 1




STA20006 Analysis of Variance and Regression – Assignment 2



Jade Huynh



102111784




Submitted as: Huynh_Jade_Assignment2

Due date: 22nd May 2020 – 11:59PM

, Jade Huynh – 102111784 2

TASK A (16 marks)

The researchers of this study investigated potential differences in amount of sleep (recorded

over 24 hours) in babies. It was hypothesised that: (1) Babies trained to co-sleep would sleep

more compared to babies trained with ‘cry out’ method, and (2) babies trained with ‘cry out’

method would sleep more compared to babies trained using ‘controlled’ crying.

A study was conducted to compare amount of sleep across different sleeping methods

(cry out, co-sleeping and controlled crying) in babies. It was hypothesised that babies trained

to co-sleep would sleep more compared to babies trained with ‘cry out’ method. It was also

hypothesised that babies trained with ‘cry out’ method would sleep more compared to babies

trained using ‘controlled’ crying. The mean and standard deviation of amount of sleep across

different sleeping methods is shown in Figure 1.

Figure 1.

Mean of amount of sleep across different sleeping methods




Note: error bars represent 95% confidence intervals