Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Width-804-en_uu-Width-804-en
   name	uu-Width-804-en
   section	Inferential Statistics/Confidence Intervals/Width
   type	schoice
   solution	FALSE, TRUE, FALSE, FALSE
   Type	Calculation
   Language	English
   Level	Statistical Literacy

   Question

   Using data from a randomly drawn sample of fifteen children aged 3 to 5 years, the following regression equation was constructed:

   $Y = 0.75 + 0.75X$

   $X =$ age in years; $Y =$ The number of correctly completed Piaget’s experiments on the concept of shape constancy.

   The total number of completed trials equals 6.

   Furthermore, given is: $M_X = 3$; $s_X = 2$; $s.e. = 0.75$.

   If one wants to estimate his y score with 95% confidence for a 4-year-old child, the width of the estimation interval is equal to:

   
   
   1. FALSE: 1.50
   2. TRUE: 2.94
   3. FALSE: 4.15
   4. FALSE: 8.00