Answer:
Yes, the manufacturer can estimate the proportion of all customers at this dealership who feel that its service is exceptionally good.
No, the manufacturer cannot estimate, the proportion of customers who rated the service as exceptionally good, about the other dealerships.
Step-by-step explanation:
A sample of 65 customers from a dealership is selected and it is determined that 55% of the customers rated the service as exceptionally good.
According to the central limit theorem if a large random sample selected from an unknown population then the sampling distribution of sample proportion (
) follows a normal distribution.
Then the population proportion can be estimated by the sample proportion value.
That is, 
.
Thus, the manufacturer can estimate the proportion of all customers at this dealership who feel that its service is exceptionally good using the sample proportion value of 
.
Since the sample is selected from a specific dealership, he cannot estimate, the proportion of customers who rated the service as exceptionally good, about the other dealerships.
The altitudes of equal length, BE and CF gives AB = AC, from which we have;
- ∆ABC is an isosceles triangle
<h3>How can the RHS rule be used to indicate an isosceles triangle?</h3>
From the given description, we have;
BE = CF
<CFB = <BEC = 90° All right angles are congruent
BC = BC by reflexive property of congruency
BC = The hypotenuse side of triangles ∆BFC and ∆CEB
Therefore;
∆BFC is congruent to ∆CEB by Right angle Hypotenuse Side, RHS, rule of congruency.
Therefore;
BF = CE by Corresponding Parts of Congruent Triangles are Congruent, CPCTC
Similarly, we have;
∆AEB is congruent to ∆AFC, by Side-Angle-Angle, SAA, rule of congruency
Which gives;
FA = AE by CPCTC
BF + FA = CE + AE, by substitution property of equality
BF + FA = AB
CE + AE = AC
Therefore;
Therefore;
- ∆ABC is an isosceles triangle
Learn more about rules of congruency here:
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hello :
<span> (21)(7)(3x) = (21×7×3)(x) = 441x </span>
Answer:
0.0594.
Step-by-step explanation:
The standard error of a proportion p, in a sample of size n, is given by:
In a sample of 62 horses with enteroliths, she finds 42 are fed two or more flakes of alfalfa.
This means that 
So
So the correct answer is:
0.0594.
