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Jjoint probability distribution

suppose that x and y have the following joint probability distribution X 2 4 _______________________________________________ 1 0.10 0.15 Y 3 0.2 0.3 5 .1 .15 Find the marginal distribution of x and y Find the conditional distribution of y given x=2

Subject:

Statistics

Topic:

All Topics

Posting ID:

2465

OTA ID:

101438

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Statistic qustion about adequate sampling

I have an xbar of 1000 and an Sx of 103. I have a random sample of 30. I am trying to figure out if this is an adequate sample without knowing the total population in an office. Can you lead me to a useable equation?

Subject:

Statistics

Topic:

All Topics

Posting ID:

2498

OTA ID:

102524

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Simple statistical excell functions/formulas

Please DO NOT respond if you're UNABLE to give detailed and specific answer to both question. Let's say I have two columns of numbers (5 in each column). 1/ Pls. advise of the following functions' FORMULA in excell: percentile range rank weighted average confidence correlation forecast 2/ and elaborate as to WHAT that function is telling me (how is it useful)?

Subject:

Statistics

Topic:

All Topics

Posting ID:

2515

OTA ID:

102827

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Chebyshev's theorem - standard deviation

A scientific calculator operates on the average 5.3 hour before needing a recharge. According to Chebyshev's theorem, if the operating times have a standard deviation of 0.6 hour. A. Between what 2 values will at least 75% of the operating times fall? B. At least what percentage of the operating times will fall in the interval from 3.5 to 7.1 hours?

Subject:

Statistics

Topic:

All Topics

Posting ID:

2550

OTA ID:

102827

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Cconfusing probability problem

I already took stats and now I am taking this random math course in which the professor is trying to make probability allot harder than it is. Please help . Please explain why in a two card hand out of a deck of 52 cards the probability of getting 2 consecutive cards is 208/1326, how did you get this?

Subject:

Statistics

Topic:

All Topics

Posting ID:

2573

OTA ID:

102827

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