Recorded the mean math exam grade for six random samples of students from the entire seventh-grade class. sample sample mean grade 1 65 2 92 3 78 4 45 5 95 6 70 why is a valid prediction for the mean of the population not possible using these samples? a )fiona had too many samples. b )fiona didn’t have enough c )the variation of fiona’s samples is too large. d )the variation of fiona’s samples is too small.

C)

Step-by-step explanation:

every other number has no quarrel with the other, just looks like random numbers.

C

Step-by-step explanation:

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.