The answer would be C. If the question is asking for the cost to rent a CAR then y should be what your equation equals too, not x. Second off, if you follow the dots, you see that at 5 days the car rental cost is at 200. If you divide 200 by 5 then you get 40.

5 0

3 years ago

Use the given information to find the minimum sample size required to estimate an unknown population mean μ

Nastasia [14]

Answer:

Step-by-step explanation:

Margin of error = E = $ 120

Confidence Level = 95%

The z-score for 95% confidence level from the z-table = z = 1.96

Population standard deviation = σ = $593

Sample size = n = ?

The formula to calculate the margin of error is:

$E=\frac{z \sigma}{\sqrt{n} }$

Re-arranging the equation, we get:

$\sqrt{n}=\frac{z \sigma}{E}\\\\ n = (\frac{z \sigma}{E})^{2}$

Using the given values in above equation, we get:

$n=(\frac{1.96 \times 593}{120} )^{2}\\\\ n = 93.8$

Rounding of to next higher integer, we get n = 94

Thus, we need a sample size of 94 to estimate an unknown population mean μ

4 0

3 years ago