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Softa [21]
1 year ago
9

The cumulative distribution function f(x) of a discrete random variable x is given by f(0) =. 30, f(1) =. 70, f(2) =. 90 and f(3

) = 1. 0. Find p[x = 1].
Mathematics
1 answer:
Lisa [10]1 year ago
7 0

Correlation between x & y is 0.6125.

In probability theory and statistics, the cumulative distribution function of a real-valued random variable X, or simply the distribution function of X weighted by x, is the probability that X takes a value less than or equal to x.

The cumulative distribution function (CDF) of a random variable X is defined as FX(x)=P(X≤x) for all x∈R. Note that the subscript X indicates that this is the CDF of the random variable X. Also note that the CDF is defined for all x∈R. Let's look at an example.

Learn more about cumulative distribution here: brainly.com/question/24756209

#SPJ4

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If two fair dice are tossed, what is the smallest number of throws, n, for which the probability of getting at least one double
amid [387]

This is a rather famous probability problem.

The easiest way to solve this is to calculate the probability that you WON'T roll a "double 6" (or a twelve) each time you roll the dice.  There are 36 ways in which dice rols can appear and only one is a twelve.  So, for one roll, the probability that you will NOT get a twelve is (35/36)^n where 35/36 is about .97222222 and n would equal 1 for the first trial.  So for your first roll the odds that you WON'T get a 12 is .97222222.

For the second roll we calculate (35/36) to the second power or (35/36)^2 which equals about .945216.

When we get to the 24th roll we calculate (.97222222)^24 which equals 0.508596.  

For the 25th roll, we calculate (.97222222)^25 which equals  0.494468.  For the first time we have reached a probability which is lower than 50 per cent.  That is to say, after 25 rolls, we have reached a point in which the probability is less than 50 per cent that we will NOT roll a twelve.

To phrase this more clearly, after 25 rolls we reach a point where the probability is greater then 50 per cent that you will roll a 12 at least once.

Please go to this page 1728.com/puzzle3.htm and look at puzzle 48. (The last puzzle on the page).  An intersting story associated with this probability problem is that in 1952, a gambler named Fat the Butch bet someone $1,000 that he could roll a 12 after 21 throws.  (He miscalculated the odds [as we know you need 25 throws] and after several HOURS, he lost $49,000!!!)

Please go that page and it has a link to the Fat the Butch story.


3 0
3 years ago
Factor out -2 out of -6x+10
topjm [15]
-2 (3x -5)
..............
5 0
3 years ago
Read 3 more answers
Does the equation y = 2(x - 1) represent a linear function?
Eva8 [605]

Answer:

yes

Step-by-step explanation:

after you distribute you get:

y = 2x - 2

this is a linear function that crosses the y-axis at -2 and has a slope of 2

7 0
3 years ago
Angle A B D is a right angle, which is the measure of Angle C B D? Angle A B D is intersected by line C to form angles 75 degree
drek231 [11]

Answer:

15 degrees

Step-by-step explanation:

Since ABD is a right angle it equals 90 degrees

ABC is 75 degrees

ABC + CBD = ABD

75 + CDB = 90

Subtract 75 from each side

75-75 + CDB = 90-75

CDB = 15

The other angle is 15 degrees

6 0
3 years ago
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HELP IM GIVING BRAINLIEST!!!
Kobotan [32]

Answer:

I think H

Step-by-step explanation:

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