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Blizzard [7]
3 years ago
10

Help me grade 9! Thankyou

Mathematics
1 answer:
algol133 years ago
4 0

Answer:

got ya

Step-by-step explanation:

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Which of the following scores has the better relative position ( as measured by the z score) a. A score of 53 on a test for whic
Kisachek [45]

Answer:

d. Cannot be determined with the information provided.

Step-by-step explanation:

Z-score:

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Finding the better relative position:

The score with the better relative position is the one with a higher z-score.

To find the z-score, the mean and the standard deviation is needed, and in this question, the standard deviation is not given, and thus, the correct answer is given by option d.

3 0
2 years ago
A department store has a sale on shoes. For every pair of shoes, the sale price is 3/4 of the ticket price. If the sale price fo
andre [41]

Answer:

48

Step-by-step explanation:

Let p =  ticket price of the shoes

p * 3/4 = 36

Multiply each side by 4/3

4/3 *3/4 p = 4/3 *36

p = 48

The ticket price is 48 dollars

7 0
2 years ago
Two angles of a triangle measure 55° and 20°.
PolarNik [594]
The answer is c because of the fact that if the 2 angles at 55 and 20 that means that you have to add them together and get to 180 for the triangle to be true
4 0
3 years ago
Horse kg of grass in 12 days how much how much does he eat in 9 days​
Zolol [24]

Step-by-step explanation:

The horse eats 9/12 in 9 days.

3 0
2 years ago
What is the GCF of the numerator and denominator in the following fraction? -99/176
Lady bird [3.3K]
-99 = -9*11
176 = 16*11

Both factorizations have 11 show up. It turns out that 11 is the largest common factor. 

Answer: C) 11

Note: if you divide both numerator and denominator by 11, then the fraction reduces to -9/16
8 0
3 years ago
Read 2 more answers
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