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svp [43]
1 year ago
14

A teacher summarizes grades on an exam by,Min = 26, Q1 = 67, Q2 = 80, Q3 = 87, Max = 100, Mean = 76, Mode = 100, Standard deviat

ion = 76, IQR = 20She incorrectly recorded one of these. Which one do you think it was? Why?
Mathematics
1 answer:
chubhunter [2.5K]1 year ago
5 0

we have

Min=26

Q1=67

Q2=80

Q3=87

Max=100

Mean=76

Mode=100

standard deviation=76

IQR=20

so

In this problem

the mean is equal to the standard deviation

therefore

<h2>The standard deviation is incorrectly</h2>
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8 0
3 years ago
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How do i calculate the percentage difference between two numbers????
lawyer [7]

When finding the percent difference between two numbers, there are two ways you can do this.

1. The first way is how to calculate the percentage INCREASE of two numbers:

-The formula is Increase / Original Number × 100 = % increase

Step 1: Find out the difference between the two numbers you're comparing. New number - Original number = Increase.

Step 2: Divide the increase by the original number and then multiply your answer by 100. (If your answer is a negative number, then it is a percent decrease, not a percent increase.)

2. The second way is how to calculate the percentage DECREASE of two numbers:

Step 1: Find out the difference between the two numbers you're comparing. Original number - New number = Decrease.

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8 0
3 years ago
On Kathleen's credit card statement get last balance was $89.70. She made a payment of $20, had new charges totaling $32.11, and
Leona [35]
Hi there

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Hope it helps
5 0
3 years ago
Victor wants to have at least 10 dozen cookies for the bake sale. Which of the following inequalities correctly represents the n
finlep [7]

Answer:

c ≥ 10 dozen

Step-by-step explanation:

Victor wants to have at least 10 dozen cookies for the bake sale.

In layman terms it can be understood as that Victor wants either  10 dozen cookies or more than that such as 11, 12, 13, 50 , 100 whatever number is greater than 10.

Let the no. of dozen of cookies wanted by him is c

according to condition

if victor wants  either 10 dozen cookies

it can be represented mathematically as

c = 10 dozen  (1)

_____________________________________

If victor wants no. of dozens of cookies greater than 10 .

it can be written as

c >10  dozen (2) (">" is symbol for greater than . expression simply means value of x should be greater than 10)

______________________________________________

now combining  equation one and two, we have

c ≥ 10 dozen . It can means that x can take value starting from 10 to any no greater than..

7 0
3 years ago
Question 5<br> Which expression is equivalent to 5(6+4)
Marianna [84]
PEMDAS
6 + 4 = 10
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50 is your answer

I hope this helps :)
3 0
3 years ago
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