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Varvara68 [4.7K]
3 years ago
15

The length of a rectangular garden is 20 feet and the width is 15 feet. What is the ratio of length to width?

Mathematics
1 answer:
8090 [49]3 years ago
7 0

Answer:

4:3 because 20 divided by 5 is 4 and 15 divided by 5 is 3.

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a pound of ground beef costs $2.00. you have a coupon for 25% off. how much will you pay for a pound of beef?
artcher [175]
$2.00=100%-25%=75%
50%=$1.00
so that means 75% =$ 1.50
6 0
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What is the width of a rectangle with an area fo 5\8in2 and a length of 10 inches?
Paul [167]

Answer:

1/16 inches

Step-by-step explanation:


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9-5 divided by (8-3) x 2+6
garik1379 [7]

Answer:

8

Step-by-step explanation:

9-5÷(8-3)×2+6

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6 0
3 years ago
According to Inc, 79% of job seekers used social media in their job search in 2018. Many believe this number is inflated by the
Fynjy0 [20]

Answer:

Null hypothesis:p\leq 0.79  

Alternative hypothesis:p > 0.79  

z=\frac{0.849 -0.79}{\sqrt{\frac{0.79(1-0.79)}{370}}}=2.786  

p_v =P(z>2.786)=0.00267  

So the p value obtained was a very low value and using the significance level given \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 0.79.  

Step-by-step explanation:

1) Data given and notation

n=750 represent the random sample taken

X=314 represent the respondents that use social media in their job search.

\hat p=\frac{314}{370}=0.849 estimated proportion of respondents that use social media in their job search

p_o=0.79 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 the true proportion is hgiher than 0.79.:  

Null hypothesis:p\leq 0.79  

Alternative hypothesis:p > 0.79  

When we conduct a proportion test we need to use the z statisticc, 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{0.849 -0.79}{\sqrt{\frac{0.79(1-0.79)}{370}}}=2.786  

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 right tailed test the p value would be:  

p_v =P(z>2.786)=0.00267  

So the p value obtained was a very low value and using the significance level given \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 0.79.  

7 0
3 years ago
What is 5% of $37.95
Elena L [17]
$36.05
Hope I helped
6 0
3 years ago
Read 2 more answers
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