Answer:
the third selection is corret
Step-by-step explanation:
Ax + by + c = 0, k = - a/b.
so The slope of the first line = ,
the slope of the second line = ;
So these two lines are parallel and they don't intersect
Trick or treaters arrive to your house according to a Poisson process with a constant rate parameter of 20 per hour. Suppose you
1 answer:
Answer:
The expected value of interarrival time (in minutes) from the previous trick or treater to the next one is 3 minutes.
Step-by-step explanation:
We have a Poisson process with a constant rate parameter of 20 arrival per hour.
This type of processes are memory-less, meaning that no matter how much time has passed form the last event, the probabilities of an arrival stay the same.
The mean interarrival time can be calculated as the inverse of the mean arrival for the Poisson process.
If the Poisson process has a rate of 20 arrivals per hour, the mean interarrival time is:
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Answer: 49.85%
Step-by-step explanation:
Given : The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped ( normal distribution ) and has a mean of 61 and a standard deviation of 9.
i.e. and
To find : The approximate percentage of lightbulb replacement requests numbering between 34 and 61.
i.e. The approximate percentage of lightbulb replacement requests numbering between 34 and .
i.e. i.e. The approximate percentage of lightbulb replacement requests numbering between and
. (1)
According to the 68-95-99.7 rule, about 99.7% of the population lies within 3 standard deviations from the mean.
i.e. about 49.85% of the population lies below 3 standard deviations from mean and 49.85% of the population lies above 3 standard deviations from mean.
i.e.,The approximate percentage of lightbulb replacement requests numbering between and
= 49.85%
⇒ The approximate percentage of lightbulb replacement requests numbering between 34 and 61.= 49.85%
Answer:
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