Mathematics, 17.07.2019 11:00 ilarheab
The number of pages in the books in a library follow a normal distribution. the mean number of pages in a book is 150 with a standard deviation of 30. if the library has 500 books, how many of the books have less than 180 pages.
Answers: 1
= 30, using the normal distribution to get the answer is just using Z. So, what we need is P(X<180). ![Z= \frac{x-E[X]}{\sigma } = \frac{180-150}{30} = \frac{30}{30} = 1](/tpl/images/0099/9020/e24e3.png)
(1) = 0.8413. 
Other questions on the subject: Mathematics
Mathematics, 21.06.2019 14:30, stupidjew5496
Two rigid transformations are used to map abc to qrs. the first is a translation of vertex b to vertex r. what is the second transformation? a reflection across the line containing ab a rotation about point b a reflection across the line containing cb a rotation about point c
Answers: 2
Mathematics, 21.06.2019 18:00, cexe2630
The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old
Answers: 1
Mathematics, 21.06.2019 19:00, kaylaamberd
What is the expression in factored form? -x^2 + 3x + 28 a. (x-7)(x-4) b. -(x-7)(x+4) c. (x+4)(x+7) d. -(x-4)(x+7)
Answers: 2
You know the right answer?
The number of pages in the books in a library follow a normal distribution. the mean number of pages...
Questions in other subjects:
Chemistry, 07.10.2020 03:01
English, 07.10.2020 03:01
