My NotesAsk Your Teacher -11 points MIntroStat8 5.E.522.XP Although cities encou

Question

My NotesAsk Your Teacher -11 points MIntroStat8 5.E.522.XP Although cities encourage carpooling to reduce tra to four decimal places.) c congestion, most vehicles car only one person. For example 66% of vehicles on the roads are occupied by ust the driver. Round your answers (a) If you choose 10 vehicles at random, what is the probability that more than half (that is, 6 or more) carry just one person? (b) If you choose 120 vehicles at random, what is the probability that more than half (that is, 61 or more) carry just one person? (Use the normal approximation.)

Explanation / Answer

a) P( X>=6)

Use excel function

1-BINOM.DIST(5,10,0.66,TRUE)

= 0.7730

b) P( X>=61)

Use excel function

1-BINOM.DIST(61,120,0.66,TRUE)

= 0.9996

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