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bazaltina [42]
3 years ago
6

PLEASE ANSWER THESE MATH QUESTIONS. I NEED TO ACE THIS

Mathematics
1 answer:
Elena-2011 [213]3 years ago
5 0

Answer:

all i know is that the last slide is D the last one

hope this helps :)

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There are two college entrance exams that are often taken by students, Exam A and Exam B. The composite score on Exam A is appro
elena55 [62]

Answer:

B.The score on Exam A is better, because the percentile for the Exam A score is higher.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

Two exams. The exam that you did score better is the one in which you had a higher zscore.

The composite score on Exam A is approximately normally distributed with mean 20.1 and standard deviation 5.1.

This means that \mu = 20.1, \sigma = 5.1.

You scored 24 on Exam A. So

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

Z = \frac{24 - 20.1}{5.1}

Z = 0.76

The composite score on Exam B is approximately normally distributed with mean 1031 and standard deviation 215.

This means that \mu = 1031, \sigma = 215.

You scored 1167 on Exam B, s:

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

Z = \frac{1167 - 1031}{215}

Z = 0.632

You had a better Z-score on exam A, so you did better on that exam.

The correct answer is:

B.The score on Exam A is better, because the percentile for the Exam A score is higher.

3 0
3 years ago
Solve: 9x-7≤28+4x;x€W​
Natasha_Volkova [10]

Answer:

z ≤ 7

Step-by-step explanation:

9x - 7 ≤ 28 + 4x

9x - 4x ≤ 28 + 7

5x ≤ 35

x ≤ 35 / 5

x ≤ 7

4 0
2 years ago
Read 2 more answers
HELPP PLEASE
Aleksandr [31]
152.6315 is because If you dived 870 by 5.7 it will be that.
6 0
3 years ago
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Write an equation in slope-intercept form of the line with slope 4 and a point at<br> (0, -3)*
bogdanovich [222]
Y=4x-3
Follow this equation y=mx+b (m=slope, b= point given)
3 0
3 years ago
Please, I need help!
Nikitich [7]

1. in 1 tree, he will get 13 apples

2. yes there is a proportional relationship in the data because there are 13 apples per tree

3. y=13x (y represents the total of apples he can get in the number of trees he picked. x represents the number of trees)

4. if there were 25 trees, he would have picked 325 apples because

13*20 is 260

13*5 is 65

260+65 is 325

8 0
3 years ago
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