Answer:
1 and 3 are biased
Step-by-step explanation:
A biased sample is ond where all individuals were not given equal likelihood of being selected.
Number 1;
Picking students from the cafeteria would lead to sampling bias because not every student from the school eats from the cafeteria. Those she selected can not be used to account for the whole school. Those that use the cafeteria are only a representation of the whole school and not the entire school.
For number 3:
Paul is interested in finding the mean number of cloth shoppers In a mall and is only collecting data from one clothing store without considering other stores in the mall.
This is a parabola which opens upwards and the directrix will be of the form
y = k
the general form is
4p(y - k) = (x - h)^2 we have:-
1/4(y + 3) = (x - 2)^2
so the vertex is at (2, -3)
4p = 1/4 so p = 1/16
so the focus will be at (2 , -2 15/16)
and directrix is y = -3 1/16
His dog weighs 2.975 pounds on the moon, his dog weighs 14.525 more pounds on earth
Answer:
-5x+4
Step-by-step explanation:
(3x*2x-6x+2)-(4x*2x-3x-2)
(3*2x-6x+2)-(4*2x-3x-2)
(6x-6x+2)-(8x-3x-2)
answer:
-5x+4
Answer:
88
Step-by-step explanation:
you add all of her scores which is 313
then you divide by 4 to get 78.35
find the amount you need to bring the average up by calculateing different grades
