Answer:
The probability that a randomly selected call time will be less than 30 seconds is 0.7443.
Step-by-step explanation:
We are given that the caller times at a customer service center has an exponential distribution with an average of 22 seconds.
Let X = caller times at a customer service center
The probability distribution (pdf) of the exponential distribution is given by;
Here, = exponential parameter
Now, the mean of the exponential distribution is given by;
Mean =
So, ⇒
SO, X ~ Exp()
To find the given probability we will use cumulative distribution function (cdf) of the exponential distribution, i.e;
; x > 0
Now, the probability that a randomly selected call time will be less than 30 seconds is given by = P(X < 30 seconds)
P(X < 30) =
= 1 - 0.2557
= 0.7443
The number -15 represents in a negative integer
<h3>How to determine what -15 represents in integers?</h3>
The number is given as:
Number = -15
Integers are numbers that do not have decimal points
The categories of integers are:
- Positive integers (i.e. numbers greater than 0)
- Zero
- Negative integers (i.e. numbers less than 0)
The given number -15 is less than 0
Hence, the number -15 represents in a negative integer
Read more about integer at
brainly.com/question/17695139
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43, 52, 56, 47, 53, 60, 45, 40, 52, 48, 50<br>
Find the median and mode of the following data.
Molodets [167]
Answer:
median = 50
mode = 52
Step-by-step explanation:
B. 74%
This is because the complement plus the original must equal 100%.
So...
100 - 26 = 74