You play a game of dice at the state fair, but suspect the dice may have been rigged. You observe the game owner rolling the dice 78 times and note the following results:
Face "1" "2" "3" "4" "5" "6"
Observed count 8 13 18 14 19 6
(a) Which hypotheses should be used to test if the dice are fair:
Identify H0:
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 1/6, implying the dice are unfair.
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 0, implying the dice are fair.
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 1/6, implying the dice are fair.
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 0, implying the dice are unfair.
Identify Ha:
-Ha: every p ≠ 1/6, implying the dice are unfair.
-Ha: at least one p≠ 1/6, implying the dice are unfair.
-Ha: every p ≠ 1/6, implying the dice are fair.
-Ha: at least one p ≠ 1/6, implying the dice are fair.
(b) What is the expected count for each side of the dice?
(c) Is the cell count condition met?
-No, because some cells have less than 10 observed counts.
-Yes, because the expected cell count is at least 5 for all cells.
-Yes, because the expected cell count is close to the observed cell count for all cells.
-No, because some cells have less than 30 observed counts.
(d) Calculate the contribution to the test statistic for the dice side with number "1": (Use 4 decimals):
(e) The full test statistic is χ2 = 10.462. What is the P-value? (Use 4 decimals.)
(f) What is the appropriate test conclusion, for α = 0.05?
-There is sufficient evidence the dice are unfair.
-There is insufficient evidence the dice are unfair.
-There is insufficient evidence the dice are fair.
-There is sufficient evidence the dice are fair.