First, i would look at the word sum. what does it mean by sum? the sum of two numbers is what? I think of it as sum=its an addition problem and the sum is what those two numbers added together equal. For example the sum of one and two is thee.
Lets say Matt's number is x.
So we got three numbers here; x, 7.5 and 38.2.
how about i simplyfy; "the sum of his number and 7.5 is 38.2"
What it is saying is that...
x and 7.5's sum is 38.2
if sum means it is an addition problem and 38.2 is the answer to this addition problem between 7.5 and x, even though you want to find x... then if you know this, your neext step is to translate this into an equation.
x plus 7.5 equals 38.2
x+7.5=38.2.
when it is an equation, you must subtract 7.5 by both sides. so it would be x=38.2-7.5
38.2-7.5 is... 30.7
that means x, Matt's number, is 30.7.
to do some these kinds of problems, you have to translate the sentences into an equation.
when it says the word product it is a multiplication problem
when a number is decreased, it is less than the original amount. so you are subtracting from the original number. so it would be "the number minus lets say 2 is equal to lets say four." that would mean the number is 6. x-2=4 is the equation.
I hope this helped out... I don't have the time to explain everything... this info may help...
Answer:
The proportion of former smokers with a university education is (A) 0.15
The proportion of men with a high school education that are current or former smokers is (B) 0.30
The degrees of freedom for the chi-square test for this two-way table are (B) 6
Step-by-step explanation:
The first thing to note is the two way table and ensure the proper arrangement of the figures in the table (Kindly find attached a picture of how the table should look)
Now, on to the first question on the former smokers with a university education = (43+28)/459 = 71/459 = 0.15 which is option A. [This is the total sum of former smokers with college and graduate school education].
The second question on the proportion of men with a high school education that are current or former smokers = (54+31+36)/459 = 0.285 = 0.30 (approximate value) which is option B.
The third question on the degrees of freedom for the chi-square test for this two-way table can be found with the formula DF = (r-1)(c-1) where,
DF = Degree of freedom ,
r = number of rows = 3
c = number of columns = 4 [<em>Kindly note that you have to exempt the row and columns with the totals</em>]
Therefore, DF = (3-1)(4-1) =2*3 = 6 which is option B.
Answer:
198
Step-by-step explanation:
2(9)(11)
Since you know that r = 9 and t = 11, you can substitute the variables to numbers. Then you just multiply to get 198. Hope this helps :)
X=27 I think this is correct
Answer:
i have no idea sorry =(
Step-by-step explanation:
