Math Is Fun Forum

Jlo

Member

Registered: 2011-05-12

Posts: 4

HELP me

hi, help me. i didnt know how to write this, so i took screen shots of the questions that i cant figure out, thanks for help.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: HELP me

Hi Jlo;

I am having trouble reading that, please check to see if I have the points right for #9.

If I have the points right then this is the best fit line.

y = 0.5 x+3.000909090909091 you can safely truncate this to
y = 0.5 x+3

For questions 13 and 15 please copy them word for word. The copies you have up there seem to have the edges missing. Please tell me the name and author of the book.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jlo

Member

Registered: 2011-05-12

Posts: 4

Re: HELP me

hi numbers for 9 are right.

13. find the best predicted cost of slice of pizza when the consumer price index (CPI) is 182.5 (in the year 2000)

15.  Blood preasure measurements. Find the best predicted systolic blood pressure in the left arm given the systolic blood pressure in the right arm in 100 mm Hg.

the book is called 'essentials of statistics' by maria f triola.

Last edited by Jlo (2011-05-13 00:20:43)

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: HELP me

Hi

13)

If I am seeing the points correctly.

I fit a linear regression model through the points and then I plugged in CPI =182.5.

The projected cost of the pizza slice will be 1.67

15)

I fit a linear regression model through the points and then I plugged in right = 100.

175.03 is the systolic pressure in the left arm.

Please check both sets of points for accuracy.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.