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Mrrafil [7]
3 years ago
15

Suppose you buy a new car whose advertised mileage is 23 miles per gallon​ (mpg). After driving your car for several​ months, yo

u find that its mileage is 19.4 mpg. You telephone the manufacturer and learn that the standard deviation of gas mileages for all cars of the model you bought is 1.07 mpg.
A. Find the​ z-score for the gas mileage of your​ car, assuming the advertised claim is correct.
B. Does it appear that your car is getting unusually low gas​mileage?
Mathematics
2 answers:
WITCHER [35]3 years ago
8 0

A.

mu = population mean = advertised mean = 23

x = raw score = 19.4

sigma = population standard deviation = 1.07

z = (x - mu)/sigma

z = (19.4 - 23)/1.07

z = -3.36448598130841

z = -3.36

=======================================

B.

The general rule is that if -2 \le z \le 2, then the z score is not unusual. Otherwise, it is unusual.

Since z = -3.36 falls outside the range, the car is getting unusually low gas mileage.

Sedbober [7]3 years ago
7 0

Answer:

B.

Step-by-step explanation:

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Answer:

Your answer would be $255

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Step-by-step explanation:

To solve these kind of problems, what we have to do is find how much of 340 is 25%, and then subtract that number to the original price.

Let's give you some important information in the text:

  • 25% off
  • $340

With the information above, we can solve our problem.

First, we would need to find how much of 340 is 25%, and to do that, we would multiply 340 by 0.25:

340*0.25 = 85

When you solve, you should get 85. But, you're not done yet, we need to find out how much the sales price is, not how much of it is discounted.

In order to find the sales price, we would get our original number (the number it originally cost), and subtract it with the amount of money it's removing (85).

In this case, we would subtract 340 by 85.

340-85=255

Your FINAL answer should be 255

The sales price of the laptop would be $255.

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5 0
3 years ago
Can someone help mme
Vanyuwa [196]

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ok this is that and that is this.hope this helps

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2 years ago
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Answer:

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Step-by-step explanation:

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I think that the answer would be two triangles.

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