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alexgriva [62]
3 years ago
9

An operations analyst counted the number of arrivals per minute at an ATM in each of 30 randomly chosen minutes. The results wer

e: 0, 3, 3, 2, 1, 0, 1, 0, 0, 1, 1, 1, 2, 1, 0, 1, 0, 1, 2, 1, 1, 2, 1, 0, 1, 2, 0, 1, 0, 1. For the Poisson goodness-of-fit test, what is the expected frequency of the data value X
Mathematics
1 answer:
liraira [26]3 years ago
8 0

Step-by-step explanation:

since Poisson distribution parameter is not given so we have to estimate it from the sample data. The average number of of arrivals per minute at an ATM is

\hat{\lambda}=\bar{x}=\frac{\sum x}{n}=\frac{30}{30}=1

So probabaility for \mathrm{X}=1 is

P(X=1)=\frac{e^{-\lambda} \lambda^{x}}{x !}=\frac{e^{-1} \cdot 1^{1}}{1 !}=0.3679

So expected frequency for X=1 is 0.3679^{*} 30=11.037 (or \left.11.04\right) .

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Which number line shows the solution to fx-5 > 3?
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3 years ago
In the given right triangle, AX is the altitude. If CX-9 and AX - 9, what is the length of BC? "Note: Figure not drawn to scale"
kenny6666 [7]

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I’m pretty sure the answer is C

6 0
2 years ago
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PLZ HURRY IT'S URGENT!!!!!!!!!!
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\:  \:  \:  \frac{9}{12} \\  =   \frac{3 \times 3}{3 \times 4} \\  =  \frac{3}{4} \\  =  \frac{3}{4} \times 1 \\  =  \frac{3}{4} \times  \frac{2}{2} \\  =  \frac{6}{8} =  \frac{3}{4}.

So, Option C is the correct answer.

Hope this will help you. 

If you like my answer. Please mark it as brainliest  And  Be my follower if possible.

8 0
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Help plz no links unhelpful answers will get reported use formulas plz. I'm being gneerous
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what's the question?? I b.d ont get it

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