Explain how you can use a quick picture to find 3× 2.7
2 answers:
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Answer:
Therefore the area of the quadrilateral =35 cm²
Step-by-step explanation:
Given, the length of one of diagonal of quadrilateral is 10 cm and perpendicular drawn from the opposite vertices to this diagonal are the length of 2.8 cm and 4.2 cm.
A diagonal divided a quadrilateral into two triangle.
Therefore the area of the quadrilateral
= sum of the area of the triangles
cm² [ area of a triangle
]
=35 cm²
Answer:
So if we compare the p value and using any significance level for example we see that
so we can conclude that we have enough evidence to reject the null hypothesis, and we can conclude that the proportions are different at 5% of significance.
Step-by-step explanation:
Data given and notation
represent the number of residents in a certain city and its suburbs who favor the construction of a nuclear power plant
represent the number of people suburban residents are in favor
sample 1 selected
sample 2 selected
represent the proportion of residents in a certain city and its suburbs who favor the construction of a nuclear power plant
represent the proportion of suburban residents are in favor
z would represent the statistic (variable of interest)
represent the value for the test (variable of interest)
Concepts and formulas to use
We need to conduct a hypothesis in order to check if the proportions are different, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
We need to apply a z test to compare proportions, and the statistic is given by:
(1)
Where
Calculate the statistic
Replacing in formula (1) the values obtained we got this:
Statistical decision
The significance level provided is ,and we can calculate the p value for this test.
Since is a two tailed test the p value would be:
So if we compare the p value and using any significance level for example we see that
so we can conclude that we have enough evidence to reject the null hypothesis, and we can conclude that the proportions are different at 5% of significance.