Answer:
Step-by-step explanation:
1. Let's write the following formula for calculate the area of a rectangle:
Where is the lenght (the longer side) and
is the width (the shorter side).
2. You know that the length is 2.5 times as long as the other side, which indicates a multiplication. Then:
3. So, you must substitute into the equation for calculate the area of the rectangle and then you must simplify.
4. Then, you obtain the following expression:
Answer:
Step-by-step explanation:
6+2=8
6*2=12
+
= 36+4=40
Complete Question
Pennsylvania Refining Company is studying the relationship between the pump price of gasoline and the number of gallons sold. For a sample of 14 stations last Tuesday, the correlation was 0.65.At the 0.01 significance level Can the company conclude that the correlation is positive
Answer:
Yes the company conclude that the correlation is positive
Step-by-step explanation:
From the question we are told that
The sample size is n = 14
The correlation is r = 0.65
The null hypothesis is
The alternative hypothesis is
Generally the standard deviation is mathematically evaluated as
The degree of freedom for the one-tail test is
The standard error is evaluated as
The test statistics is evaluated as
The p-value of of t is obtained from the z table, the value is
Given that then we reject the null hypothesis
Hence the company can conclude that the correlation is positive