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STA 301 statistics and probability Online Quiz No. 03 Solution and Discussion Spring 2013 Due Date:Jun 28, 2013

STA 301 statistics and probability Online Quiz No. 03 Solution and Discussion Spring 2013 Due Date:Jun 28, 2013 STA 301 statistics and probability Online Quiz No. 03 Solution and Discussion Spring 2013 Due Date:Jun 28, 2013

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Please all students related this subject Share your online Quizzes here to help each other.thanks

 

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Quiz Start Time: 04:06 PM

Time Left

32
sec(s)

Question # 1 of 10 ( Start time: 04:06:53 PM )

Total Marks: 1

P (|X| < 1.5) =

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Quiz Start Time: 04:06 PM

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60
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Question # 2 of 10 ( Start time: 04:08:17 PM )

Total Marks: 1

If f(x) is a continuous probability function, then P(X = 2) is:

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35
sec(s)

Question # 3 of 10 ( Start time: 04:08:55 PM )

Total Marks: 1

A spinner has equal regions numbered 1 through 15. What is the probability that the spinner will stop on an even number or a multiple of 3?

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From the following table; x 2 3 4 5 6 P(x) 1/6 2/6 1/6 1/6 1/6 The value of sum{x P(x)} will be:

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Quiz Start Time: 04:06 PM

Time Left

30
sec(s)

Question # 5 of 10 ( Start time: 04:10:52 PM )

Total Marks: 1

The number of telephone calls that pass through a switchboard has a Poisson distribution with mean equal to two per minute. The probability that no telephone call passes through the switch board in a minutes is:

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For any probability density function, the TOTAL area under the curve is always:

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Quiz Start Time: 04:06 PM

Time Left

36
sec(s)

Question # 7 of 10 ( Start time: 04:12:53 PM )

Total Marks: 1

What does it mean when a data set has a standard deviation equal to zero:

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Quiz Start Time: 04:06 PM

Time Left

34
sec(s)

Question # 8 of 10 ( Start time: 04:14:03 PM )

Total Marks: 1

What is the mean and variance of binomial distribution b(x; n, p)?

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The probability distribution of X is given below. x: 0 1 2 3 4 p(x): 0.73 ? 0.06 0.04 0.01 What is the value of missing probability?

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Quiz Start Time: 04:06 PM

Time Left

40
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Question # 10 of 10 ( Start time: 04:16:22 PM )

Total Marks: 1

Two independent variables have bivariate distribution, then E(X.Y) =

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STA301_Online_Quiz#03_Spring_2013

See the attached file please

Attachments:

helllllllllllo quizz h

 

1 .A correlation coefficient:
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2 .The bivariate probability density function of continuous r.v’s X and Y, satisfy the following property:





3 .The number of parameters in Poisson distribution is (are):


4 .The moment ratios b1 and b2 of normal distribution are:


5 .We use the Poisson approximation to the binomial when:

6 .In a bivariate probability distribution of X and Y, If f(1,1)=4/15, g(1)=2/3, h(1)=2/5, then


Coefficient of variation in case of discrete random variable equals to:


7 .If we roll three fair dice then the total number of outcomes are:

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