3 years ago

The product of twenty one negative integers is negative? True of false

1 answer:

5 0

A negative number once is negative. Multiplied by another negative number, it's positive. Multiply that positive number by a negative number, and you have a negative number again. Repeating that pattern, with odd numbers being negative, it is true

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Answer:

a) correct option is

Poisson distribution is 6.2 and standard deviation is 2.49

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Step-by-step explanation:

Given data:

mean number is given as 6.2

correct option is

Poisson distribution is 6.2 and standard deviation is 2.49

we know that variance is given as $\sigma^2 = mean = 6.2$

hence, standard deviation is given as $\sqrt{6.2} = 2.48998$

thus standard deviation is 2.49

correct option is

Poisson distribution is 6.2 and standard deviation is 2.49

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$P(X \leq 2) = P(X =0) + P(X =1) + P(X =2)$

$= \frac{e^{-6.2} 6.2^0}{0!} +\frac{e^{-6.2} 6.2^1}{1!} +\frac{e^{-6.2} 6.2^2}{2!}$

= 0.002029 + 0.012582+ 0.039006

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