Question $1(2$ points each$)$ : Choose the correct answer of the following:

Which of the following scatter plots represent a negative liner relationship between two variables:

The point estimation of the populations' variance is

$s$

$diamond{s}^2$

diamond${}^2$

diamond$\stackrel{}{x}$

I don't know

Suppose that hat$(y)=-1\mathrm{.}223x+230\mathrm{.}33,$ then the expected value of $y$ at $x=103$ is

o $217\mathrm{.}7331$

$229\mathrm{.}0703$

$104\mathrm{.}3610$

$230\mathrm{.}33$

o I don't know

If $=1\mathrm{.}79,$ then the Margin of error of estimating $$ using a sample of size $46$ at $=0\mathrm{.}1$ is

$0\mathrm{.}5173$

$0\mathrm{.}6796$

$0\mathrm{.}5564$

$0\mathrm{.}4342$

O I don't know

In a scatter plot, the more the spread of dots the the relationship.

$0$ weaker

$$ stronger

$$ perfect

$$ linear

I don't know

When $$ is unknown, then the confidence interval....

can be found

$$ can be found

cannot be

$0$ equals zero

I don't know using $t-$tables using $z-$tables found

A study of relationship between a person's age and height. The dependent variable $(Y)$ is

$$ Age

$$ Height

cannot be

neither one

$0$ I don't know decided