There are 24 children in the class, there are 10 girls and 14 boys, I want to make goodie bags for my birthday. I want pink bags for the girls and green for the boys. The pink bags cost 2 dollars each and the green cost 4 dollars each. How much would I have to spend on the goodie bags?
Answer:
The outside edge is 44 ft longer than the inside edge.
Step-by-step explanation:
The outside edge has a 1000 ft radius. Because the curve makes a 180° turn, the length of the curve is half of the perimeter of a circle.
Perimeter of a circle:
Outside length of the curve is given by:
R=1000 ft
Then,
Inside length of the curve is given by:
r=R-14 ft
The difference between the two lengths is:
The outside edge is 44 ft longer than the inside edge.
Answer:
For this case we want to test if in IT companies more than 20% of employees prefer to use Skype rather than a mobile phone (alternative hypothesis) and the complement would be the the null hypothesis. So then the system of hypothesis are:
Null hypothesis:
Alternative hypothesis:
And for this case we should use a righ tail test based on the alternative hypothesis.
Step-by-step explanation:
Previous concepts
A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".
The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".
The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".
Solution to the problem
For this case we want to test if in IT companies more than 20% of employees prefer to use Skype rather than a mobile phone (alternative hypothesis) and the complement would be the the null hypothesis. So then the system of hypothesis are:
Null hypothesis:
Alternative hypothesis:
And for this case we should use a righ tail test based on the alternative hypothesis.
When you need to visually compare two things, that's when you would use a graph. (That is for qualitative data.) Of course, when you need quantitative data, nothing is better than an equation.
- We first compute the product.
- We can transform the product into positive if we use this formula:
<h3>We apply it:</h3>
<h2>Answer: </h2>
<h3><em><u>MissSpanish</u></em></h3>