# S1 May 13 model answers :)

On the box plot 24 was marked it was supposed to be 14 :D

- Created by: sebastian parsons
- Created on: 18-05-13 07:24

First 223 words of the document:

Sl MAY t3

1. A meteorologist believes that there is a relationship between the height above sea level,

ft m, and the air temperature, t

oC. Data is collected at the same time from 9 diflerent

places on the same mountain. The data is summarised in the table below.

h t400 1 100 260 840 900 550 1230 100 770

t 3 10 20 9 10 l3 5 24 16

:

[You may assume that Zh:7150, ) r:t to, >h'z :7171s00, >)P 1116'

:

>th - 64980 and S,, 371.561

(a) Calculate S,,, and S,,,,. Give your answers to 3 significant figures'

(3)

(b) Calculate the product moment corelation coefficient ior this data.

(2)

(c) State whether of not your value supports the use of a regression equation to predict the

air temperature at different heights on this mountain. Give a reason for your answer.

(1)

(d) Find the equation of the regression line ol I on ft giving your answer in the form

7: o+ bh.

(4)

(e) Interpret the value of b.

(1)

(f) Estimate the difference in air temperature between a height of 500 m and a height of

1000 m.

. (2)

o)

=- -O'q 52*

c) e\es/ r rS chse -16

-SuJ)est co-3tt"'e-

d) b. StX

= -o.ol5oa+

Strtr

## Comments

No comments have yet been made