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marissa [1.9K]
3 years ago
8

A normal distribution has a mean of 60 and a standard deviation of 2. Determine the z-

Mathematics
1 answer:
a_sh-v [17]3 years ago
6 0

Answer: z score is -19

Work Shown:

x = 22 is the raw score

mu = 60 is the mean

sigma = 2 is the standard deviation

z = (x-mu)/sigma = formula to find z scores

z = (22 - 60)/2

z = -38/2

z = -19

The z score of -19 means we are 19 standard deviations below the mean. Anything beyond 3 standard deviations is often considered unusual/rare as most of the data in the normal distribution is within 3 standard deviations (approximately 99.7% of the distribution)

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Fittoniya [83]

Answer:

y=-1/2x-8

Step-by-step explanation:

m=(y2-y1)/(x2-x1)=(-6-(-5))/(-4-(-6))=(-6+5)/(-4+6)=-1/2

slope is -1/2

y-y1=m(x-x1) where m=slope

y-(-5)=-1/2(x-(-6))

y+5=-1/2(x+6)

y=-1/2x-6/2-5

y=-1/2x-3-5

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3 years ago
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If Lana deposits $500 into a savings account that gains simple interest at
Oksana_A [137]

Answer:

10 years

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 2%/100 = 0.02 per year,

then, solving our equation

t = 100 / ( 500 × 0.02 ) = 10

t = 10 years

The time required to

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3 0
3 years ago
Someone plz help me I will give brainliest
Brut [27]

Answer:

$33.81

Step-by-step explanation:

Strawberries = $2.49 Per Pound (Bought 3)

Blueberries = $3.19 Per Pound (Bought 2)

Pineapples = $4.99 Per Pound (Bought 4)

So we have to multiply each price with the number of fruits bought.

So, For Example, Strawberries: <em>$</em><em>2</em><em>.</em><em>4</em><em>9</em><em> </em><em>×</em><em> </em><em>3</em><em> </em><em>=</em><em> </em><em>$</em><em>7</em><em>.</em><em>4</em><em>7</em>

After you did all three individually, add them all up.

Strawberries : <em>$</em><em>7</em><em>.</em><em>4</em><em>7</em>

Blueberries : <em>$</em><em>6</em><em>.</em><em>3</em><em>8</em>

Pineapple : <em>$</em><em>1</em><em>9</em><em>.</em><em>9</em><em>6</em>

<em>Total</em><em> </em><em>=</em><em> </em><em>$</em><em>3</em><em>3</em><em>.</em><em>8</em><em>1</em>

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3 years ago
Piper claims that 3(2a + 2) is equivalent to 5a + 6. She checks her claim by substituting -3 for a. Is Piper's claim correct? Wh
Paha777 [63]

Answer:

Piper's claim is not correct.

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3(2(-3)+2) = 5(-3)+6

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1. Simplity the following into lowest term <br>3x - 2 - 2x​
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The answer is X-2 ........
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