The slope of a linear regression is the rate of change of the line of the best fit
The linear regression is given as:
Where
Using the above representations, the slope means that the wait time per staff is 1.62 minutes
Also, the slope value is realistic because time can be measured in decimals
Read more about linear regressions at:
Answer:
the solution
Step-by-step explanation:
Given equation is 6 ( x+4) =20
<u>Distributive property</u>:-
a .(b + c) = a .b + a . c
Given equation is 6 ( x+4) =20
by using distributive property 6 .x + 6.4 =20
6x +24 =20
subtracting '24' on both sides, we get
6x +24 -24 = 20 -24
6x = -4
dividing by '6' on both sides, we get
<u>Final answer</u> :-
the solution of given equation is
Answer:
They now should survey 800 people.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
The margin of error is:
In this problem:
Same level of confidence, so same z
Same proportion, so same
We have to change n
We want to reduce the margin of error by half.
M is inverse proportion to the square root of n. That is, as n increases, M decreases.
We want to decrese M by half. So we need to increase n by a factor of 2^2 = 4
The first survey had a sample of 200 people
Increasing by a factor of 4.
200*4 = 800
They now should survey 800 people.