Question

The variability in the sample (denoted by SS) refers to sum of squares of deviations of values

         from their sample mean. The variability in the samples of gas consumption (miles per gallon) by

         Japanese and USA cars are respectively SS_JPN = 51 and SS_USA = 53 and population means of gas

         consumption are denoted by Ս_JPN and Ս_USA. The pooled variance of these variabilities denoted

         by S_p² = 4. Then H₀: Ս_JPN = Ս_USA vs H₁: Ս_JPN ≠ Ս_USA can be tested by t test. The calculated value

         of t_STAT = 2.0. At α(alpha)=0.05, the true statement (s) is/are:

         a. H₀ is accepted

         b. t_α/2 can’t be found to make decision

         c. Degrees of freedom not known to get t_α/2

         d, Nothing can be underscored from a, b, c because of incomplete data

Answer 1