stat questions!

[sparklypinkx3]

Hi i really need some help with some stat questions.
Here they are. You don't have to answer them all but if you could answer at least would it would mean alot =)

if a regression line has formula y = 2.65x - 7.32
what is the y intercept and what is the slope?
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If the correlation coefficient for a paired data set is -.75, which of the following must be true?
a. There is a negative correlation between x and y.
b. The slope of the regression line is negative.
c. There is a strong negative correlation between x and y.
d. There is no correlation between x and y.

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For a data set with 10 pairs of data, suppose that the following is given:

The sum of the x's is 325.
The sum of the y's is 526.
The slope of the regression line is 3.87.

What is the formula for the regression line?
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Given the following set of paired data, calculate the correlation coefficient. Round your final answer to two decimal places.
[x] 6 I 9 I 12 I 15 I 23 I
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[y] 11 I 5 I 1 I 6 2 I
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Suppose that the correlation coefficient for a set of paired data with 20 pairs is 0.68. Is there a correlation between x and y? Explain.

 

[diddi]

i think you have come to the wrong forum. try domymathshomework.com

 

[Ruddles]

Welcome to the board.

Do you have an Excel question?