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bekas [8.4K]
3 years ago
8

What is the value of y?

Mathematics
2 answers:
Ket [755]3 years ago
8 0

I would guess it would be letter B. Let me know if I’m right.

Arisa [49]3 years ago
5 0

the answer is 108°

mark brainliest plssss

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Which box-and-whisker plot represents this data: 6,9, 13, 13, 18, 20, 24, 25, 26, 28, 30, 30?
Greeley [361]

Check the pictures for the answer

4 0
2 years ago
According to the University of Nevada Center for Logistics Management, 6% of all merchandise sold in the United States gets retu
jeka57 [31]

Answer:

p_v =P(z>3.390)=0.000349  

If we compare the p value and the significance level given \alpha=0.1 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 10% of significance the proportion of returns at the Houston store is significantly higher than 0.06 or 6%.

Step-by-step explanation:

1) Data given and notation n  

n=80 represent the random sample taken

X=12 represent number of items returned

\hat p=\frac{12}{80}=0.15 estimated proportion of items returned

p_o=0.06 is the value that we want to test

\alpha=0.1 represent the significance level

Confidence=90% or 0.90

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 proportion of returns at the Houston store was more than the national expectation (0.06):  

Null hypothesis:p\leq 0.06  

Alternative hypothesis:p >0.06  

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{0.15 -0.06}{\sqrt{\frac{0.06(1-0.06)}{80}}}=3.390  

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=0.1. The next step would be calculate the p value for this test.  

Since is a right tailed test the p value would be:  

p_v =P(z>3.390)=0.000349  

If we compare the p value and the significance level given \alpha=0.1 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 10% of significance the proportion of returns at the Houston store is significantly higher than 0.06 or 6%.

4 0
3 years ago
Brainliest and 5 full stars. What is 20+5-39 and 5+24 -2
Nadya [2.5K]

Answer:

The answer is : 20+5-39= <u><em>-14</em></u> and 5+24-2= <u><em>27</em></u>

Hope this helps!!!!

Step-by-step explanation:

5 0
3 years ago
Find the sum.<br> 50,000<br> 6,000<br> 910<br> 3,408<br> 25<br> +_____
nevsk [136]

Answer:

60,343

Step-by-step explanation:

50,000

 6,000

     910

 3,408

+      25

_______

60,343

Hope this helps!!! Pls give brainliest!

6 0
3 years ago
Read 2 more answers
The graph models a weight bobbing up and down on a spring. How far does the weight travel, going from maximum displacement to mi
just olya [345]

Answer:

4 inches.

Step-by-step explanation:

The distance in units from 2 to -2 is 4.

7 0
3 years ago
Read 2 more answers
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