Which of the following statements about these data is definitely correct? A. The

Question

Which of the following statements about these data is definitely correct? A. The median for the superior data was calculated as the mean of two values.X B. Based on the measures of centre only, the shape of the superior data could be (slightly) left skewed. C. The maximum of the superior data is approximately equal to the first quartile for the inferior data. D. The lowest 25% of the superior data is composed of more data points than the lowest 25% of the inferior data. The interquartile range for the inferior data is smaller than the interquartile range of the superior data Many people who work in Toronto, Ontario commute from surrounding cities like Burlington; a common commuter method is to take the GO train. During rush hour, the likelihood that any individual gets a seat on the GO train from Burlington to Toronto isl 40%; if 10 individuals get on the GO train traveling from Burlington to Toronto (and enter different sections of the train, so their chances of getting a seat is independent), what is the probability that at least 2 of the individuals get a seat P040 0.9536 9 10 B. 0.9597 C. 0.9983 D. 0.9996 E. Not enough information for a valid answer. P(X-) n-X Property of !. Waugh The University of Western Ontario)0C 0 HOO.L0

Explanation / Answer

This is binomial distribution with n = 10 , p = 0.4.

P(x) = nCx px (1-p)n-x

p( x >=2) = 1 - p(x < 2 )

= 1 - P( x <= 1 )

= 1 - { p( x = 0) + p( x = 1) }

= 1 - {10C0 0.40 0.610 + 10C1 0.41 0.69 }

= 1 - (0.00605 + 0.04031)

= 1 - 0.04636

= 0.95364

= 0.9536 ( rounded to 4 decimal places)

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.