I'LL GIVE BRAINLIEST:
1 answer:
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Answer:
(a) and
(b) The sample variance is and the sample standard deviation is
Step-by-step explanation:
(a)
The sum of these 17 sample observations is
and the sum of their squares is
(b)
The sample variance, denoted by , is given by
where
Applying the above formula we get that
The sample standard deviation, denoted by <em>s</em>, is the (positive) square root of the variance:
Applying the above formula we get that
The equation of the line is given as 
A straight line equation is given in the form
where 
is the gradient and 
is the y-interest.
We need to rearrange to make 
the subject.
⇒ from here we can read the gradient and the y-intercept. The gradient, 
and 
.
<span>A line that is parallel to
will have the same gradient, but different y-intercept. One example of equation of a line that is parallel to is 
</span>
A straight line equation is given in the form
We need to rearrange
<span>A line that is parallel to
</span>