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VladimirAG [237]
3 years ago
10

1,900 joggers run at the city park every morning at 6 A.M. Of 190 asked, 35 of them enjoy running that early. Predict how many o

f the 1,900 that like to run that early. 700 190 250 350
Mathematics
1 answer:
Sonja [21]3 years ago
3 0
350 like to run that early
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Emilia and Ferdinand took the same freshman chemistry course: Emilia in the fall, Ferdinand in the spring. Emilia made an 83 on
Wewaii [24]

Answer:

z = \frac{83-76}{8}=0.875

z = \frac{79-65}{12}=1.167

As we can see the z score for Ferdinad is higher than the z score for Emilia so on this case we can conclude that Ferdinand was better compared with his group of reference.

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Emilia case

Let X the random variable that represent the scores of a test, and we know that

Where \mu=76 and \sigma=8

The z score formula is given by:

z=\frac{x-\mu}{\sigma}

Since Emilia made 83 points we can find the z score like this:

z = \frac{83-76}{8}=0.875

Ferdinand case

Let X the random variable that represent the scores of a test, and we know that

Where \mu=65 and \sigma=12

The z score formula is given by:

z=\frac{x-\mu}{\sigma}

Since Ferdinand made 79 points we can find the z score like this:

z = \frac{79-65}{12}=1.167

As we can see the z score for Ferdinad is higher than the z score for Emilia so on this case we can conclude that Ferdinand was better compared with his group of reference.

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3 years ago
Answer 25 questions from any subject to get <br> 400 pts <br> ill give 25%<br> and branliest
sladkih [1.3K]
17.55 dollars for every single
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The amount of simple interest accrued on a sum of money varies jointly with the amount of money, the interest rate, and the time
ziro4ka [17]
Find the amount of the first one
P=168/0.04*3
P=1400
Use the in the second one to find the interest
I=1400*0.06*4
I=336
336 is double the amount of 168
So the answer is B
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3 years ago
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What is 9+(-18) <br> pls explain
irinina [24]
Answer

-9


Explanation

Since it is 9+(-18) you can change the equation to 9-18 to make it easier to understand. Therefore 9-18= -9
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3 years ago
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For a standard deck of cards, where one card is removed, find the probability (in fraction form only) that the card:
Liono4ka [1.6K]

Answer:

a. 4/13, b. 1/2, c. 3/52, d. 8/13

Step-by-step explanation:

a.

aces in a deck: 4

face cards in a deck: 12

(4+12)/52  = 16/52 = 4/13

b.

even numbers in a deck: 26

26/52 = 1/2

c.

only 3 face cards that are diamonds

3/52

d.

reds in a deck: 26

face cards in a deck: 12

face cards that are red: 6

(26+12-6)/52 = 32/52 = 8/13

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