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Leni [432]
3 years ago
6

PLS HELP AGAIN ASAP THIS THE SECOND TO LAST PROBLEM ON MORE AFTER THIS

Mathematics
1 answer:
Rufina [12.5K]3 years ago
3 0

Answer:

140

Step-by-step explanation:

because 2 cups of flour turned to 20 cups is to 14 cups of sugar to 140 cups

so the ratio goes from 2: 14 to 20: 140

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What is your favorite color? A larger survey of countries, including the United States, China, Russia, France, Turkey, Kenya, an
prohojiy [21]

Answer:

z=\frac{0.253 -0.24}{\sqrt{\frac{0.24(1-0.24)}{75}}}=0.264  

p_v =2*P(z>0.264)=0.792  

So the p value obtained was a very high value and using the significance level given \alpha=0.05 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the proportion of students said that blue is their favorite color is not different from 0.24

Step-by-step explanation:

Data given and notation

n=75 represent the random sample taken

X=19 represent the students said that blue is their favorite color

\hat p=\frac{19}{75}=0.253 estimated proportion of  students said that blue is their favorite color

p_o=0.24 is the value that we want to test

\alpha=0.05 represent the significance level

Confidence=95% or 0.95

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the true proportion is different from 0.24.:  

Null hypothesis:p=0.24  

Alternative hypothesis:p \neq 0.24  

When we conduct a proportion test we need to use the z statisitc, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.253 -0.24}{\sqrt{\frac{0.24(1-0.24)}{75}}}=0.264  

Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The significance level provided \alpha=0.05. The next step would be calculate the p value for this test.  

Since is a bilateral test the p value would be:  

p_v =2*P(z>0.264)=0.792  

So the p value obtained was a very high value and using the significance level given \alpha=0.05 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the proportion of students said that blue is their favorite color is not different from 0.24

7 0
3 years ago
The probability of getting a white marble from a bag is 1/5. If there are 37 white marbles in the bag, what is the total number
Svetradugi [14.3K]
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7 0
3 years ago
Plsss hello me I’m going to get a whooping !!
tatuchka [14]

Answer:

411, 467, 523

Step-by-step explanation:

add 56 to each cycle

411+56 = 467

467+56 = 523

8 0
2 years ago
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What's the numerator for the following rational<br> expression?<br> j/k + 1/k = ?/k
lys-0071 [83]

Answer:

j+1

Step-by-step explanation:

j/k + 1/k = ?/k

Since the denominator is the same, we can add the numerators

j/k + 1/k = ?/k

(j+1)/k = ?/k

7 0
2 years ago
(-12)÷6+2 pls help math is hard for me
SVEN [57.7K]

The Answer is -3/2

Below is how I got that answer

(-12) / 6+2

-12/ 8  (Simplify the problem by adding 6 and 2, remove the parenthesis).

-3/2 (Simplify -12/8 by dividing it by 4)

4 0
2 years ago
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