A book has 5 chapters and a total of 90 pages. How many pages are in each chapter

Mathematics

2 answers:

nydimaria [60]3 years ago

7 0

450 is in each chapter.

kondor19780726 [428]3 years ago

4 0

The book has 18 pages in each chapter.

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Step-by-step explanation:

Since we have given that

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So, z = 2.326

(a) Construct a 98% confidence interval for the mean height of all college students.

$x\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=(174.5\pm 2.326\times \dfrac{6.9}{\sqrt{50}})\\\\=(174.5+2.26,174.5-2.26)\\\\=(176.76,172.24)$

(b) What can we assert with 98% confidence about the possible size of our error if we estimate the mean height of all college students to be 174.5 centime- ters?

Error would be

$\dfrac{\sigma}{\sqrt{n}}\\\\=\dfrac{6.9}{\sqrt{50}}\\\\=0.976$

Hence, a) (176.76,172.24), b) 0.976.

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