Answer:
0.047619
P.S. do you need to round?
A: Suppose Mr. Moore decides to use 20 seventh graders as the sample. Is this sample a random sample? Explain your reasoning.
Ans: No, because he only chose the seventh graders which is invalid since he wants to have to use the mean height which involves the 6th, 7th and 8th graders.
B: Mr. Moore decides to use a random number generator to select 20 students from the school. Suppose that when choosing 20 students using the random generator on the graphing calculator, Mr. Moore’s sample is all eighth graders. Does that mean the sample is not a random sample? Explain your reasoning.
Ans: No, it is still a random sample. Since he is using a random generator, there is a possibility that the random generator would pick all students from the 8th grade. Unlike the first one, the random generator is not biased towards any grade, it is just a coincidence.
Answer:
13.33 (or 13 1/3 if they ask for a fraction)
Step-by-step explanation:
we subtract the pair of pants then divide what we get by 6
Consider the converses:
a) If two planes have no points in common, then they are parallel. (true)
b) If a point lies on the y-axis, then it has x-coordinate 0. (true)
c) If two angles have the same measure, then they are congruent. (true)
d) If a figure has four sides, then it is a square. (FALSE) (A figure with 4 sides may not even be a plane figure.)
Answer:
We have to find point that partition line segment AB with end points (-5,3) (-1,-5) in ratio 1:3
Assume (-5,3) as ( a,b)
Assume (-1,-5) as (c,d)
Assume ratio 1:3 as m:n
Step-by-step explanation:
Remember this formula
Partition point =( mc + na)/m+ n , ( md+ nb)/m+n
=[ (1)(-1)+ 3(-5)]/1+3, ( 1(-5) + 3(3))/1+3
= -1 -15)/4,( -5 + 9)/4
= -16/4, 4/4
= -4, 1
