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3 years ago

Which of the following z-scores indicates the most extreme observation?

Mathematics

1 answer:

UNO [17]3 years ago

5 0

Answer:

Step-by-step explanation:

Normally Z scores in a std normal distribution curve lie between -3 and 3 comprising more than 99% of total area.

Any entry outside (-3,3) can be considered as an extreme observation.

Here we have hence a) -4.3 is the most extreme observation.

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Given that 84 separates the lowest 75% of the scores from the highest 25% of the scores,

This means 84 is the 75th percentile and similarly 65 is the 25th percentile.

Thus we have 84 has the percentile rank of 75

Option C

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A truck can be rented from Company A for $100 a day plus $0.40 per mile. Company B charges $20dayplus $0.90 per mile to rent the

dangina [55]

Answer:

the number of miles is 160

Step-by-step explanation:

The computation is given below:

Let us assume the miles be x

For company A

y = $100 + $0.40x

And, for company B

y = $20 + $0.90x

In order to find out the number of miles, the rental cost of the company A should be less than the company B rental cost

SO,

$20 + $0.90x > $100 + $0.40x

Subtract $20 from both sides

0.90x > 80 + 0.40x

Now subtract 0.40x from both sides

0.50x >80

x>160

So the number of miles is 160

6 0

2 years ago

George found that he blinked 85 times in 15 minutes. At this rate, how many seconds passed during 51 blinks?

Juliette [100K]

540 seconds which is equal to 9 minutes.

7 0

3 years ago

Write the sum using summation notation assuming the suggested pattern continues 9-18+36-72

IgorC [24]

I think it is 45 sorry if its wrong

5 0

2 years ago

Read 2 more answers

The average price of a home in a certain town was $74,000 in 2012, but home prices

xxTIMURxx [149]

Answer:

$47,360

Step-by-step explanation:

8 percent X 8years is equal to 64percent

74,000 X 64/100=47,360 dollars

8 0

2 years ago

Solve for x. x2 = 100 A. -200, 200 B. -100, 100 C. -50, 50 D. -10, 10

ICE Princess25 [194]

Answer:

D. -10, 10

Step-by-step explanation:

Instead of inserting values into x to solve, let's isolate x.

In order to do this, we must take the square root of both sides.

$\sqrt{x^{2} } =\sqrt{100}$

$x=\sqrt{100}$

To find the square root of 100, we must figure out what = 100 when multiplied by itself. Reminder, it can be both a positive or a negative square root, as positive times positive is a positive, and negative times negative is a positive.

The square root of 100 is -10 or 10, as 10 x 10 or -10 x -10 = 100.

Hope this helps! :)

3 0

2 years ago