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4 years ago

The mean of a set of data is 148.87 and its standard deviation is 68.29. Find the z score for a value of 490.19.

1 answer:

6 0

<span>The mean of a set of data is 148.87 and its standard deviation is 68.29. Find the z score for a value of 490.19
the z-score is given by:
z=(x-</span>μ<span>)/</span>σ
plugging in the values in the expression we get:
z=(490.19-149.87)/68.29
z=340.32/68.29
z=4.9835

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Lina20 [59]

Answer:

3.646

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2 years ago

Read 2 more answers

PLEASE HELP ASAP.

alexandr1967 [171]

Answer:

$Y' = (-2, 4\frac{2}{3})$

Step-by-step explanation:

Given

$Y = (-3,7)$

$Scale\ Factor = (\frac{2}{3}x,\frac{2}{3}y)$

Required

Determine Y'

Y' can be solved by multiplying the scale factor by Y

i.e.

$Y' = Scale\ Factor * Y$

For, the x coordinates.

$Y' = \frac{2}{3}x$

Where

$x = -3$

$Y' = \frac{2}{3} * -3$

$Y' = \frac{-6}{3}$

$Y = -2$

For the y coordinates:

$Y' = \frac{2}{3}y$

Where

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$Y' = (-2, 4\frac{2}{3})$

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3 years ago

F(x)=√x+11. Find the inverse of f(x).

MaRussiya [10]

Answer:

f(x)⁻¹ = (x - 11)²

Step-by-step explanation:

To find the inverse of the function, you need to (1) swap the places of the "x" and "y" variables and then (2) solve for "y". Remember, f(x) is another way of writing "y".

y = √x + 11 <----- Original equation

x = √y + 11 <----- Swap variables

x - 11 = √y <----- Subtract 11 from both sides

(x - 11)² = (√y)² <----- Square both sides

(x - 11)² = y <----- Simplify

Another way of writing the output of an inverse function is with f(x)⁻¹.

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2 years ago

At most jasmine can spend $45 on bread and ham to make sandwiches. She already bought the loaves of bread for $13 and will buy h

Andrews [41]

Answer:

45-13= 32

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Step-by-step explanation:

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3 years ago

Ami'yan runs every day for exercise at a rate of 1 kilometer every 15 minutes. How many meters does he run in 1 hour? - Thank yo

Alona [7]

Answer:

The total distance covered in 1 hour is 4000 meters.

Step-by-step explanation:

The distance Ami'yan runs is 15 minutes = 1 kilometer

Using the unit formula,

The distance ran in 1 minute = $(\frac{1}{15} ) \textrm{Kilometer}$

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Hence, the total distance covered in 1 hour = 4000 meters.

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3 years ago