Question

1)

Find the correlation coefficient r for the given table below and use it to determine if there is a Strong Negative or Strong Positive or Weak Negative or Weak Positive correlation. (Check your spelling!)

PSAT	183	207	167	206	197	142	193	176
SAT	2200	2040	1890	2380	12290	2070	2370	1980

2)

Find the correlation coefficient r for the given table below. (Round to the nearest thousandth) (ONLY TYPE IN THE NUMBER!)

x	10	8	13	9	11	14	6	4	12	7	5
y	9.14	8.14	8.74	8.77	9.26	8.10	6.13	3.10	9.13	7.26	4.74

3)

Find the correlation coefficient r for the given table below and use it to determine if there is a Strong Negative or Strong Positive or Weak Negative or Weak Positive correlation. (Check your spelling!)

x	230	265	358	480	530
y	15.9	15.7	15.4	15.3	14.9

4) Find the area under the standard normal to the right of z = -1.50 and to the left of z = 2.50 (Round answer to the nearest ten-thousandths.)

5) Find the area under the standard normal to the right of z = 1. (Round answer to the nearest ten-thousandths.)

Answer 1

Dear student, we can provide you with the solution of one type of question at a time. But for your reference I will do 1 and 2 here

1) Let PSat be the X variable.

Sat be the Y variable.

You can find the solution in the following steps

There is a Weak Positive Correlation.

as the correlation calculated is close to 0 and positive

2)

We have to round the correlation coefficient to three decimal places. hence the answer is r = 0.816