Answer:
180
Step-by-step explanation:
4*45=180
5*36=180
6*30=180
9*20=180
Geography 48.9 41 9.2
Math 34.5 44 1.9
She claims that because the mean number of words on each page in the geography book is greater than the mean number of words on each page in the math book, the geography book has more words per page. Based on the data, is this a valid inference?
Yes, because the mean is larger in the geography book
No, because the mean is larger in the geography book
No, because there is a lot of variability in the geography book data
Yes, because there is a lot of variability in the geography book data
Yes, Melissa is correct, because the difference between the means is larger than the sum of the variabilities.
We know that, for 25 samples of each book, we have:
Book mean median MAD
Geography 48.9 41 9.2
Math 34.5 44 1.9
The claim, is that "the geography book as more words per page"
Notice that even if we subtract the mean standard deviation from the mean in the geography case:
48.9 - 9.2 = 39.7
And we add these in the math case:
34.5 + 1.9 = 36.4
So, even considering the variability, the geography book has more words per page. The value in the geography case is still larger, so, only with this, we conclude that her claim is valid.
If you want to learn more about means, you can read:
The number 10 increased by 6 and then doubled equals 32.
To express the situation where a number (x) is increased by 6 and then the sum is doubled, we can write it as:
2(x + 6)
In this expression, (x + 6) represents the number increased by 6, and then multiplying the sum by 2 doubles the result.
For example, if the number x is 10, then the expression would be:
2(10 + 6) = 2(16) = 32
So, in this case, the number 10 increased by 6 and then doubled equals 32.
For more details of doubled equals :
#SPJ6
Answer:
2(X+6)
Step-by-step explanation:
Answer:
yes
Step-by-step explanation:
(2,2)
x=2 y=2
x+y=4
2+2=4
4=4
5x+5y=20
5(2)+5(2)=20
10+10=20
20=20