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Sindrei [870]
3 years ago
15

Alice wanted to compare birthday cake prices in two supermarkets. She wrote down the daily prices for a few days and found that

the difference of the two sample means is $4.01. The standard deviation of the difference of the sample means is $5.46. The 95% confidence interval of the sample mean difference is between and
Mathematics
1 answer:
balu736 [363]3 years ago
8 0

The 95% confidence interval of the sample mean difference is between -8.02 and +16.38


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What is the answer to -6 2/3 - -8 1/5
Dima020 [189]
The answer is 1 8/15
5 0
3 years ago
Read 2 more answers
Plz help me with 17 part a and b I will thank u
podryga [215]
Part A

There are 2 cups in a pint, so 2 x 3 = 6
Plus 5 cups,
1 quart is equal to 1/4 of a gallon, and there are 4 cups in a gallon,
and another quart is 4 more cups,
so add all of the cups together:
6 + 5 + 4 + 4 = 19

Kelly is incorrect, because I added all of the cups together and I got 19. 

Part B

Since 4 cups fit in a quart, and she has 4 quarts, her quarts only hold 16 cups, which isn't enough, because there are 19 cups.

Hope this helped! If you have anymore questions or don't understand, please comment or DM me. :)
6 0
4 years ago
A rectangular field is eight times as long as it is wide. If the perimeter of the field is 900 feet, what are the dimensions of
Bas_tet [7]

Answer:

400 feet long

50 feet wide

Step-by-step explanation:

Length = l

Width = w

2l + 2w = 900

l = 8w

Plug the l from the bottom equation into the top equation

2 x 8w+ 2w = 900

16w = 900

Divide both sides by 16

16w/16 = 900/16

w = 50

The width is 50 feet

Now plug the new w into one of the original equations; we'll use the bottom one

l = 8(50)

l = 400

3 0
3 years ago
IN one town, the sales tax is 8%. write this percent as a fraction in simplest form.
Natalka [10]
2/25 will be the simplest form
6 0
4 years ago
Daniel made 6 out of 15 free throw shots. About how many out of the next 10 free throw shots would you expect him to make
mixer [17]
6÷15= 0.4= his percentage at the line
0.4×100%= 40%
(x represents how much he makes in 10 shots) x/10 = 40/100 (Percent from the line)
cross multiply 100x=400
isolate x 
100x÷100= 400÷100 
x=4
I predict that daniel will make 4 shots out of ten

8 0
3 years ago
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