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Arada [10]
3 years ago
9

I keep getting it wrong. Help?

Mathematics
1 answer:
balandron [24]3 years ago
4 0

Answer:

The correct equation is: x(x-8) = 240

Its is A

Step-by-step explanation:

Hope this helps ;)

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A television network is deciding whether or not to give its newest television show a spot during prime viewing time at night. If
REY [17]

Answer:

b. 1.71

z=\frac{0.5296 -0.5}{\sqrt{\frac{0.5(1-0.5)}{827}}}=1.71  

Step-by-step explanation:

1) Data given and notation

n=827 represent the random sample taken

X=438 represent the  people that indicate that they would like to see the new show in the lineup

\hat p=\frac{438}{827}=0.5296 estimated proportion of people that indicate that they would like to see the new show in the lineup

p_o=0.5 is the value that we want to test

\alpha represent the significance level

z would represent the statistic (variable of interest)

p_v represent the p value

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the true proportion is higher than 0.5:  

Null hypothesis:p \leq 0.5  

Alternative hypothesis:p > 0.5  

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.

3) Calculate the statistic

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

z=\frac{0.5296 -0.5}{\sqrt{\frac{0.5(1-0.5)}{827}}}=1.71  

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 assumed is \alpha=0.05. 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>1.71)=0.044  

If we compare the p value obtained and the significance level assumed \alpha=0.05 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the true proportion is higher than 0.5.  

8 0
3 years ago
A radio is being discounted 20%. If the sale price is $51.44, what was the original price of the radio? A. $12.86, B. 64.30, C.
katrin2010 [14]
The equation for decreasing a price by 20% is 
original price x 0.8 = sale price

Here, we can fill in the sale price so
original price x 0.8 = 51.44

This can be rearranged to show:
51.44 ÷ 0.8 = original price

So the original price was $64.30

Answer = B - $64.30

7 0
3 years ago
Read 2 more answers
Need help with literal equations
Ierofanga [76]

Answer:YES

Step-by-step explanation:

3 0
3 years ago
Can someone please help ASAP
Talja [164]
Answer:
6

how:
add up all the numbers the divide by the amount of numbers given.

Use:
First, I added all the numbers up and got 48.
Next, I divided by 8.
Last, I did 42 divided by 8 and got 6.
The mean is 6.
6 0
3 years ago
Read 2 more answers
A triangle has sides that measure 5cm, 12 cm and 13cm. What type of triangle is it?
kykrilka [37]

Answer:

i think its an isoceles

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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