Use the residual plot to analyze the result of the correlation. 0.8
0.6 -
0.4 -
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0
Residual
-0.2
-0.4 -
-0.6
-0.8 -
-1 -
-1.2
-1.4-1
2
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10 11
This is not a good model because the residual plot becomes thicker on one end.
This is a good model because the residual plot is not an obvious pattern and does not become thicker toward one of the ends.
This is a good model because the residual plot shows an obvious pattern.
This is not a good model because the residual plot has an obvious pattern.

c is the answer

step-by-step explanation:

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here

i'm sorry i don't know

step-by-step explanation:

if gloria has "carry over" minutes, (that is, any minutes paid for but not used in a month can be applied to her payment for minutes in the next month,) her total usage for the three months is: total minutes = 320 + 243 + 489 = 1052 minutes number of 200 minute blocks = 1052/200 = 5 r52 (that is 5 with a remainder of 52) rounding up the number of 200 minute blocks gives her usage for the three months as 6 blocks. the cost for six blocks is 6 x $25 = $150 she also has 200 - 52 or 148 carry over minutes if gloria pays each month and unused minutes are lost, applying the rounding up procedure to each month gives: first month usage of 320 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 second month usage of 243 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 third month usage of 489 minutes rounds up to 3 blocks of 200 minutes for a payment of 3 x $25 = $75 total payments for the three months are $50 + $50 + $75 = $175 get the plan with carry over minutes!