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Question 12 (1 point) It is reported in USA Today that the average flight cost nationwide is $380.51. You have never paid clo
Question 14 (1 point) Does the amount of hazardous material absorbed by the bodies of hazardous waste workers depend on gende
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Answer #1

Question 12:

Correct option:

(3) The true average flight cost is significantly different from $380.51.

Explanation:

p value = 0.0274 is less than \alpha = 0.05. So, the difference is significant. Reject null hypothesis.

Conclusion:

The data support the claim that the true average is actually different from $380.51

Question 14

Correct option

(4) Test statistic = - 0.797. P - Value = 0.2129

Explanation:

Pooled Standard Deviation is given by:

sp = V (nl - 1)s12 + (n2 – 1) s22 nl+ n2 - 2

(296 - 1) × 1.752 + (155 – 1) x 0.9262 -= 1.5186 296 + 155 – 2

Test Statistic is given by:

6.76 – 6.88 1.3186 x (1/296 - 1/1661 = -0.797

ndf = 296 + 155 - 2 = 449

One Tail - Left Side Test

By Technology, p - value = 0.2129

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