he got 93 percent of the questions correct on his test and 7 percent wrong :)
The arcs in the corners of the triangle signify that those two angles are equal. That means the triangle is isosceles, and the two sides opposite those angle are equal. In short,
... 4x +10 = 5x -25 . . . . . . sides opposite equal angles are equal
... 35 = x . . . . . . . . . . . . . . add 25-4x
Answer:
In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:
Null hypothesis:
Alternative hypothesis:
The statistic to check the hypothesis is given by:
And is distributed with n-2 degreed of freedom. df=n-2=10-2=8
For this case the null hypothesis represent that we don't have association betwen the dependent variable Y and the independent variable X and that means r=0. So then the best option for this case is:
The null hypothesis for the Pearson correlation coefficient states that the correlation coefficient is zero
Step-by-step explanation:
Previous concepts
The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.
And in order to calculate the correlation coefficient we can use this formula:
Solution to the problem
In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:
Null hypothesis:
Alternative hypothesis:
The statistic to check the hypothesis is given by:
And is distributed with n-2 degreed of freedom. df=n-2=10-2=8
For this case the null hypothesis represent that we don't have association betwen the dependent variable Y and the independent variable X and that means r=0. So then the best option for this case is:
The null hypothesis for the Pearson correlation coefficient states that the correlation coefficient is zero
100 + 25x >= 700
25x > = 700 - 100
25x > = 600
x > = 600/25
x > = 24
Sharon needs to sell at least 24 items to make at least $700 per week.
Answer: 0.0228
Step-by-step explanation:
please check photo explanation