Drew drives his car and Rachel drives her truck in the same direction on the highway at constant speeds for 3.25 hours. During t
1 answer:
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Keywords
system of equations, linear equation, elimination method
we have
Multiply by both sides
-----> <u>linear equation</u> A
-----> <u>linear equation</u> B
Applying the <u>elimination method</u> for solve the <u>system of equations</u>
Adds equation A and equation B
Find the value of y
therefore
the answer is the option D
<h2>Answer with explanation:</h2>
Let p be the true proportion of registered voters wish to see Mayor Waffleskate defeated.
As per given , we have
Sample size : n= 447
Number of of registered voters wish to see Mayor Waffleskate defeated = 157
I.e. sample proportion :
Confidence interval for population proportion is given by :-
, where n= sample size
= sample proportion
z* = critical z-value.
Critical z-value for 98% confidence interval is 2.33. (By z-table)
Then, the 98% confidence interval for the proportion of registered voters who wish to see Waffleskate defeated will be :
Since the 0.27 < 0.299 , it means 0.27 does not belong to the above confidence interval.
So , we reject the null hypothesis ().
So , <u>98% confidence interval does not support the claim.</u>