Ex 7.3.1

1. When sampling without replacement, the probability of obtaining a certain

sample is best given by a

hypergeometric distribution
binomial distribution
Poisson distribution
normal distribution
None of the above answers is correct

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2. The key difference between the binomial and hypergeometric distribution is

that with hypergeometric distribution

the probability of success must be less than 0.5
the probability of success changes from trial to trial
the trials are independent of each other
the random variable is continuous
None of the above answers is correct

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3. Seven students have applied for scholarships. This year 3 scholarships were

awarded. If a random sample of 3 applications (from the population of 7) is

selected,

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(a) what is the probability that 2 students were recipients of scholarships? (to 4 digits)

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(b) what is the probability that no student were the recipients of scholarship? (to 4 digits)

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4. Determine the probability of being dealt 4 kings in a 5-card poker hand? (to 8 digits)

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