Fiona recorded the mean math exam grade for six random samples of students from the entire seventh-grade class.
on
ab
sample mean grade
65
92
78
95
70
why is a valid prediction for the mean of the population not possible using these samples?
fiona had too many samples.
fiona didn't have enough samples.
the variation of fiona's samples is too large.
the variation of fiona's samples is too small.
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choice b is correct

step-by-step explanation:

we have been given the following system of inequalities;

we are required to graph the solution to the system of inequalities. using a graphing tool, the graph of the system is as shown in the attachment. the continuous line represents the graph of while the dotted line represents .

x-150=475   x=625

step-by-step explanation:

if the bike after the sale ($150) is $475 then just simply add 150 to 475.

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110