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Talja [164]
3 years ago
13

Confused on how to do this, care to help anyone?

Mathematics
1 answer:
ruslelena [56]3 years ago
8 0

Answer:

I would use a proportion for each ingredient:

Cup sugar

4:10=½:x (10×½)÷4= 1,25 cup sugar

Cup brown sugar:

4:10=¼:x (10×¼)÷4= 0.625 cup brown sugar

Peanut butter

4:10=⅔:x (10×⅔)÷4= 1,65 cup peanut butter

Cup oats

2×¼ = ½

4:10=½:x (10×½)÷4= 1,25 cup oats

Cup milk

4:10=¾:x (10×¾)÷4= 1,875 cup milk

Tsp salt

4:10=1:x (10×1)÷4= 2,5 tsp salt

2 tbsp cocoa

4:10=2:x (10×2)÷4= 5 tbsp cocoa

1 tsp vanilla

4:10=1:x (10×1)÷4= 2,5 tsp vanilla

2 eggs

4:10=2:x (10×2)÷4= 5 eggs

3 cups flour

4:10=3:x (10×3)÷4= 7,5 cups flour

12 oz nuts

4:10=12:x (10×12)÷4= 30 oz nuts

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Step-by-step explanation:

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An article presents measures of penetration resistance for a certain fine-grained soil. Fifteen measurements, expressed as a mul
balu736 [363]

Answer:

2.64-2.14\frac{1.32}{\sqrt{15}}=1.911    

2.64+2.14\frac{1.32}{\sqrt{15}}=3.369    

So on this case the 95% confidence interval would be given by (1.911;3.37)  

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=2.64 represent the sample mean for the sample  

\mu population mean (variable of interest)

s=1.32 represent the sample standard deviation

n=15 represent the sample size  

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=15-1=14

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,14)".And we see that t_{\alpha/2}=2.14

Now we have everything in order to replace into formula (1):

2.64-2.14\frac{1.32}{\sqrt{15}}=1.911    

2.64+2.14\frac{1.32}{\sqrt{15}}=3.369    

So on this case the 95% confidence interval would be given by (1.911;3.37)    

6 0
3 years ago
What times 1/2 equals -7/3
erastovalidia [21]

Answer:

2.8? maybe or 17/6

Step-by-step explanation:

8 0
3 years ago
Pls help!!!!!!!!!!!!!!!!
Helga [31]

Answer:

m1=120

m2=120

m3=120

m4=60

m1=56

m2=56

m3=56

m4=124

6 0
2 years ago
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