Exam 1

1. Metainformation

   Tag	Value
   file	Inferential_Statistics_uu-Paired-samples-601-en_uu-Paired-samples-601-en
   name	uu-Paired-samples-601-en
   section	Inferential Statistics/Parametric Techniques/t-test/Paired samples
   type	schoice
   solution	TRUE, FALSE, FALSE, FALSE
   Type	Case
   Language	English
   Level	Statistical Literacy

   Question

   An oil company claims that it has a gasoline additive that makes cars drive more economically. To prove this, it has a sample of 9 cars drive the same 1000 kilometer route twice; once without additive (Condition I) and once with additive (Condition II). The average gasoline consumption (in liters) and the corresponding squared sums are given in the table below. Based on a one-way test with $\alpha=.05$ conclude that cars with the addition drive more economically?

   

   
   
   1. TRUE: Yes, because $s_{M_D} = 0.67$ gives a $t$-value of $6.00$.
   2. FALSE: Ja, want $s_{M_D} = 0.63$ gives a $t$-value of $6.36$.
   3. FALSE: Nee, want $s_{(M_1-M_2)} = 3.99$ gives a $t$-value of $1.00$.
   4. FALSE: Nee, want $s_{(M_1-M_2)} = 3.77$ gives a $t$-value of $1.06$.
   
   
   1. Correct
   2. Not correct
   3. Not correct
   4. Not correct