We need to find out how many adults must the brand manager survey in order to be 90% confident that his estimate is within five percentage points of the true population percentage.
From the given data we know that our confidence level is 90%. From Standard Normal Table we know that the critical level at 90% confidence level is 1.645. In other words, 
.
We also know that E=5% or E=0.05
Also, since, 
is not given, we will assume that =0.5. This is because, the formula that we use will have 
in the expression and that will be maximum only when =0.5. (For any other value of , we will get a value less than 0.25. For example if, is 0.4, then 
and thus, 
.).
We will now use the formula
We will now substitute all the data that we have and we will get
which can approximated to n=271.
So, the brand manager needs a sample size of 271
#2 the pattern is by 5
#4 the pattern is by 7
Answer:
i think the answer is 392= 49/Q
Answer:
Point slope form of the line is 
Step-by-step explanation:
The point-slope form of a line is given as:
Where,
is the slope, and 
is the x point and y point respectively
<em>The question tells us the slope is 2, hence 
and the point given is (3,10) which means 
and 
. Substituting these values into the </em><em>point slope form of a line </em><em>gives us:</em>
Hence, point slope form of the line is
Step-by-step explanation:
x2 - x - 6 = 0
x2 - 3x + 2x - 6 = 0
x(x - 3) + 2(x - 3) = 0
x - 3 = 0. x + 2 = 0
x = 3 x = - 2
Option no 2 and 5 are the correct answer
