In a certain card game, for every 4 blue cards, there are 3yellow cards. there are a total of 8 blue and yellow cards in the game. how many blue cards are in the game?

95% of the lower confidence interval for the true average proportional limit stress of all such joints

7.7829

95% of the confidence interval for the true average proportional limit stress of all such joints

(7.7829, 9.3171)

Step-by-step explanation:

Step(i):-

Given that the sample size 'n' = 12

Mean of the sample = 8.55

The standard deviation of the sample (S) = 0.76

Step(ii):-

95% of the confidence interval is determined by

Degrees of freedom = n-1 = 12-1 = 11

t₀.₀₂₅ = 3.4966

(8.55 - 0.7671 , 8.55+0.7671)

(7.7829, 9.3171)

Final -

95% of the confidence interval for the true average proportional limit stress of all such joints

(7.7829, 9.3171)