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Harrizon [31]
3 years ago
12

Amanda earned a score of 940 on a national achievement test that was normally distributed. The mean test score was 850 with a st

andard deviation of 100
If 1000 students took the test, how many scored below Amanda? Use z table.
Mathematics
2 answers:
SVETLANKA909090 [29]3 years ago
7 0

Answer:

<h3><u>L</u><u>o</u><u>w</u><u>e</u><u>r</u><u> </u><u>t</u><u>h</u><u>a</u><u>n</u><u> </u><u>A</u><u>m</u><u>a</u><u>n</u><u>d</u><u>a</u> : 816 students.</h3>

hichkok12 [17]3 years ago
6 0

Answer:

lower than Amanda:  816 students

Step-by-step explanation:

An equivalent way in which to state this problem is:  Find the area under the standard normal curve to the left (below) 940.

Most modern calculators have built in distribution functions.

In this case I entered the single command   normalcdf(-1000,940, 850, 100)

and obtained 0.816.

In this particular situation, this means that 0.816(1000 students) scored lower than Amanda:  816 students.

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Substitute 7x+2y = -14,x+y = 8
AysviL [449]
From second equation  y = 8 - x so

7x + 2(8 - x) = -14
5x = -14 - 16 = -30
x = -6

and y = 8 - -6 = 14

Answer x=-6,y=14
3 0
3 years ago
To solve 1/2 ÷ 10 , Min thinks of dividing a piece of paper into 2 equal parts, dividing one of those parts into 10 equal pieces
OLEGan [10]

Answer:

.05

Step-by-step explanation:

4 0
4 years ago
QUESTION 5 of 10: You are considering selling your home. You consult with an agent who gives you the asking prices of five homes
Diano4ka-milaya [45]

Answer: $169,500

Step-by-step explanation:

The mean simply means the average price of a set of a numbers that are given. For one t calculate the mean, one has to add the numbers that are given and then divide them by the amount of numbers.

I'm the case above, the numbers given are $165,000, $188,000, $175,000, and $150,000.

Mean = ($165,000 ,+ $188,000 +$175,000 + $150,000) ÷ 4

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5 0
3 years ago
Solve the inequality and enter your solution as an inequality comparing the variable to the solution
weqwewe [10]

Answer:

x < 7

Step-by-step explanation:

We are given an equation of inequality and we have to solve the equation as an inequality.

The given equation is - 19 > x - 26

⇒ - 19 + 26 > x

⇒ 7 > x

⇒ x < 7 {Since, if a > b then we can write b < a, as they are equivalent}

Hence,the solution of the equation of the inequality is x < 7. (Answer)

8 0
3 years ago
Solve 3-4 and (1⁄2)-2
Cloud [144]

Answer:

<h2><u><em>A)   -1</em></u></h2><h2><u><em>B)   -1.5 or -3/2</em></u></h2>

Step-by-step explanation:

Solve 3-4 and (1⁄2)-2

3 - 4, 4 is greater than 3, so the result is negative (-1)

3 - 4 = -1

-----------------

1/2 is equal to 0.5, also here 2 is larger and we will have a negative result (-1.5 or -3/2)

1/2 - 2 =

0.5 - 2 = -1.5 or -3/2

8 0
2 years ago
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