Let's call :
x=the number of downloaded standard version
y= the number of downloaded high-quality version
We have : -the high-quality version was downloaded three times as often as the 
 standard version => 3x=y
 -standard version is 2.8 megabytes .the high-quality version is 4.6 
 MB.The total size downloaded for the two versions was 4482 MB
 => 2.8x+4.6y=4482
Solve for x,y
x=270 , y=810
        
             
        
        
        
Answer:
d or b or something
Step-by-step explanation:
 
        
                    
             
        
        
        
The hypothesis test shows that we reject the null hypothesis and there is sufficient evidence to support the claim that the return rate is less than 20%
<h3>What is the claim that the return rate is less than 20% by using a statistical hypothesis method?</h3>
The claim that the return rate is less than 20% is p < 0.2. From the given information, we can compute our null hypothesis and alternative hypothesis as:


Given that:
Sample size (n) = 6965
Sample proportion 
The test statistics for this data can be computed as:



z = -2.73
From the hypothesis testing, since the p < alternative hypothesis, then our test is a left-tailed test(one-tailed. 
Hence, the p-value for the test statistics can be computed as:
P-value = P(Z ≤ z)
P-value = P(Z ≤ - 2.73)
By using the Excel function =NORMDIST (-2.73)
P-value = 0.00317
P-value ≅ 0.003 
Therefore, we can conclude that since P-value is less than the significance level at ∝ = 0.01, we reject the null hypothesis and there is sufficient evidence to support the claim that the return rate is less than 20%
Learn more about hypothesis testing here:
brainly.com/question/15980493
#SPJ1
 
        
             
        
        
        
Answer:
The price of the stock is now $5.60
Step-by-step explanation:
$5.25 - $3.75 = $1.50
$1.50 + $1.85 + $2.25 = $5.60
 
        
                    
             
        
        
        
It will take her 2,000 minutes