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I am Lyosha [343]
4 years ago
10

What is the equation for a geometric sequence with a first term of 3 and a second term of −9? an = 3(−12)n − 1 an = 3(12)n − 1 a

n = 3(−3)n − 1 an = 3(3)n − 1?
Mathematics
1 answer:
Nesterboy [21]4 years ago
5 0
An=a1r^n-1
a2=a1r
-9=3r
so r = -3

then an=3(-3)^n-1
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Yes it will be appropriate to model the distribution of a sample mean with a normal model

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Given that the population is not normal, and the sample is sufficiently large, according to the Central Limit theorem, the distribution of the mean pf the sampling distribution will be approximately normal not withstanding the population from which the sample is obtained. Therefore, the mean, \overline x, and the standard deviation, \dfrac{\sigma}{\sqrt{n} }, of the sample will be equal to the mean, μ, and standard deviation, σ, of the of the population

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Malik randomly picked two numbers from 1 to 9 (including 1 and 9). the same number could be picked more than once. the first of
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The probability that the sum of the two numbers Malik picks is less than 5, given that the first number is odd and less than 5 is 0.0494.

<h3>What is a probability?</h3>

Probability is a way to gauge how likely something is to happen. Many things are difficult to forecast with absolute confidence. Using it, we can only make predictions about how probable an event is to happen, or its chance of happening.

Probability can range from 0 to 1, with 0 denoting an impossibility and 1 denoting a certainty.

Probability of an event P(E) = Number of favourable outcomes/Total number of outcomes.

Calculation for the given condition;

Either 1 or 3 must be present if a given integer is odd and smaller than 5.

The likelihood that it was picked from a set of nine numbers is (2/9).

The probability that the first integer is 1 is 50/50.

If it is and their combined number is less to 5, the second number will either be 1, 2, or 3.

The likelihood that it was picked out of the nine numbers is (3/9).

Additionally, there is a 50/50 probability that the first digit will be 3.

A second number is 1 if it is and the sum would be less than 5.

It was selected with a 1 in 9 chance of being one of the other 8 numbers.

The total probability is;

= (2/9)  times  [ (0.5 x 3/9)  +  (0.5 x 1/9) ]

= (2/9)  times  [ (1.5/9)  +  (0.5/9) ]

= (2/9)  times  [ 2/9 ]  =  4/81

= 0.0494

Therefore,  the probability that the sum of the two numbers malik picks is less than 5 is 0.0494.

To know more about probability, here

brainly.com/question/251701

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