In a study of children with a particular disorder, parents wereasked to rate their child on a variety of items related to how welltheir child performs different tasks. One item was \"Has difficultyorganizing work,\" rated on a five-point scale of 0 to 4 with 0corresponding to \"not at all\" and 4 corresponding to \"very much.\"The mean rating for 285 boys with the disorder was reported as 2.39with a standard deviation of 1.17. (Round your answers to fourdecimal places.)
Compute the 90% confidence interval. , Compute the 95%confidence interval. ,
Compute the 99% confidence interval. ,
Explain the effect of the confidence level on the width of theinterval.
We see that the width of the interval increases with confidencelevel.
We see that the width of the interval does not change withconfidence level.
We see that the width of the interval decreases with confidencelevel.
