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有几道题问你们，assignment 2
第一题，那个Tchebysheff’s Theorem
16 23 17 24 9 11 13 15 15 23 18 16 17
Using Tchebysheff’s Rule, determine the range of values that should include at least 75% of the data. Count how many actually fell into this interval and discuss whether the interval range was conservative.
第二题Use the empirical rule to:
a. Calculate a value for the standard deviation.
怎么做呀？
4. Four possible prizes are being awarded by a company. The prizes are being awarded based on a blind drawing with the following probability distribution:
x P(x)
$10 0.80
$20 0.10
$100 0.08
$1000 0.02
c. If one person is allowed to have two chances at the drawing and keep the highest prize,
what is the probability that she will leave with at least $100
. An investment opportunity has the following possible net returns and associated probabilities:
x=Net Return P(x)
$500 0.25
$1,000 0.40
$5,000 0.30
$10,000 0.05
b. Suppose you have the opportunity to participate twice. What is the probability that you will have a total net return of more that $10,000?
第一题，那个Tchebysheff’s Theorem
16 23 17 24 9 11 13 15 15 23 18 16 17
Using Tchebysheff’s Rule, determine the range of values that should include at least 75% of the data. Count how many actually fell into this interval and discuss whether the interval range was conservative.
第二题Use the empirical rule to:
a. Calculate a value for the standard deviation.
怎么做呀？
4. Four possible prizes are being awarded by a company. The prizes are being awarded based on a blind drawing with the following probability distribution:
x P(x)
$10 0.80
$20 0.10
$100 0.08
$1000 0.02
c. If one person is allowed to have two chances at the drawing and keep the highest prize,
what is the probability that she will leave with at least $100
. An investment opportunity has the following possible net returns and associated probabilities:
x=Net Return P(x)
$500 0.25
$1,000 0.40
$5,000 0.30
$10,000 0.05
b. Suppose you have the opportunity to participate twice. What is the probability that you will have a total net return of more that $10,000?
