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klasskru [66]
3 years ago
12

When a polling company calls a telephone number at random, there is only a 9% chance that the call reaches a live person and the

survey is successfully completed. Suppose the random digit dialing machine makes 15 calls. Let X = the number of calls that result in a completed survey.
(a) Calculate and interpret the mean of X.

(b) Calculate and interpret the standard deviation of X​
Mathematics
1 answer:
VikaD [51]3 years ago
7 0

Answer:

(Part A) I know the mean of x will be 1.35

Step-by-step explanation:

Just do 9 percent of 15, I nessecarly dont know how to do that math but I looked it up and gave me 1.35. and you got the mean. here is the homework my teacher gave me : I hope this helps

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The sum of two consecutive integers is 345. What are the integers? need help with it
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Answer:

hi there ☺️

Here we will use algebra to find three consecutive integers whose sum is 345. We start by assigning X to the first integer. Since they are consecutive, it means that the 2nd number will be X + 1 and the 3rd number will be X + 2 and they should all add up to 345. Therefore, you can write the equation as follows:

(X) + (X + 1) + (X + 2) = 345

To solve for X, you first add the integers together and the X variables together. Then you subtract three from each side, followed by dividing by 3 on each side. Here is the work to show our math:

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114 + 115 + 116 = 345

We know our answer is correct because 114 + 115 + 116 equals 345 as displayed above.

Step-by-step explanation:

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