Question

Which statements are NOT true about Normal random variable X (X~N(mu, sigma))? X is continuous random...

Which statements are NOT true about Normal random variable X (X~N(mu, sigma))?

X is continuous random variable

X is discrete random variable

Completely determined by mu and sigma

Symmetrical about 0

Has about 99% of observations within two sigmas from the mu

Out of 50 students surveyed in a study: 35 are undergraduates in which there are 20 from NY, and 15 are graduate students in which there are 5 from NY. What is the probability that if a student surveyed is an undergraduate then he/she is from NY?

P(from NY) = 25/50

P(Ungrad and from NY) = 20/50

P(Ungrad) = 35/50

P(Undegraduate | from NY) = 20/25

P(from NY | Undegraduate) = 20/35
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Answer #1

X is continuous random variable

X is discrete random variable

Completely determined by mu and sigma

Symmetrical about 0

Has about 99% of observations within two sigmas from the mu

Out of 50 students surveyed in a study: 35 are undergraduates in which there are 20 from NY, and 15 are graduate students in which there are 5 from NY. What is the probability that if a student surveyed is an undergraduate then he/she is from NY?

P(from NY) = 25/50

P(Ungrad and from NY) = 20/50

P(Ungrad) = 35/50

P(Undegraduate | from NY) = 20/25

P(from NY | Undegraduate) = 20/35
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