Answer:
3 over 20
Step-by-step explanation:
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:
Answer:
6.5 /4.5
x/9
x=13 cups
hope this helps you
324-285=
Answer:
30
Step-by-step explanation:
324-285
WE can estimate the numbers to nearest tens or nearest hundreds
LEts estimate the numbers to nearest tens and find the difference
324 round to nearest tens is 320
285 have 5 in once place that is equal to 5 so we add 1 with 8
285 round to nearest tens is 290
Now we find the difference
The difference is 30
If we estimate to nearest hundred then 300 -300 becomes 0