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nalin [4]
3 years ago
5

1. One skater paid $108.00 for

Mathematics
2 answers:
aliya0001 [1]3 years ago
5 0

Answer:

each jewel was 3 $

Step-by-step explanation:

divide 108.00/36= 3

11Alexandr11 [23.1K]3 years ago
5 0

Step-by-step explanation:

$3 for each jewel.

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In a poll of 1000 adults in July​ 2010, 540 of those polled said that schools should ban sugary snacks and soft drinks. Complete
erastova [34]

Answer:

z=2.53  

p_v =P(z>2.53)=0.0057  

The p value obtained was a very low value and using the significance level given \alpha=0.05 we have p_v so then we have enough evidence to reject the null hypothesis, and we can say that at 5% of significance, the proportion of adults who support a ban on sugary snacks and soft​ drinks  is more than 0.5 or 50%.

Step-by-step explanation:

1) Data given and notation

n=1000 represent the random sample taken

X=540 represent the adults that said that schools should ban sugary snacks and soft drinks

\hat p=\frac{540}{1000}=0.54 estimated proportion of adults that said that schools should ban sugary snacks and soft drinks

p_o=0.5 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)  

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that majority of adults​ (more than​ 50%) support a ban on sugary snacks and soft​ drinks, the system of hypothesis are:  

Null hypothesis:p\leq 0.5  

Alternative hypothesis:p > 0.5  

When we conduct a proportion test we need to use the z statistic, 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.

3) Calculate the statistic  

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

z=\frac{0.54 -0.5}{\sqrt{\frac{0.5(1-0.5)}{1000}}}=2.53  

4) 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 one side right tailed test the p value would be:  

p_v =P(z>2.53)=0.0057  

So the p value obtained was a very low value and using the significance level given \alpha=0.05 we have p_v so then we have enough evidence to reject the null hypothesis, and we can say that at 5% of significance, the proportion of adults who support a ban on sugary snacks and soft​ drinks  is more than 0.5 or 50%.

7 0
3 years ago
A school requires students wear uniforms. They can choose from the following options. How many total choices does a student have
Svet_ta [14]

Answer:

The answer is 16


Step-by-step explanation:


5 0
3 years ago
For each menu item at a fast food restaurant, the fat content (in grams) and the
Alexxandr [17]

Answer:

The answer is "Option a".

Step-by-step explanation:

please find the attached file.

In the given question, the positive correlation shows the scatterplot and, by adding six now higher calories, low-fat pasta, is the positive value for the new correlation of the coefficient will be decreasing.

In this question, the points are more close to the line and increasing from left to right, which can be mostly like, that's why the choice "a" is correct.

7 0
3 years ago
HELP PLEASE! i don't understand this well so if someone could please list the answer and an explanation that would be great :)
Sliva [168]

Answer: 44 I believe.

Step-by-step explanation: Please mark Brainiest if I'm right.

6 0
3 years ago
PLEASE HELP ASAP THIS IS THE LAST QUESTION AND I AM STUCK!!
Varvara68 [4.7K]
<h3>Answer:  B) 7 units</h3>

===========================================================

Explanation:

The y coordinates of the two points are the same, so we can subtract the x coordinates and apply absolute value

|R - T| = |-6 - 1| = |-7| = 7

Or we can say

|T - R| = |1 - (-6)| = |1 + 6| = |7| = 7

Either way, the two points are 7 units apart.

You could use the distance formula to get the same answer, but that's definitely overkill in my opinion. The trick mentioned above also could work if the x coordinates were the same, but the y coordinates were different. In any other case, you would have to use the distance formula.

5 0
3 years ago
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