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Dmitrij [34]
3 years ago
7

Student A's scores have a standard deviation of 5.4 and Student B's scores have a standard deviation of 10.6. What does Student

B's higher standard deviation mean of his/her test scores?
Mathematics
1 answer:
Basile [38]3 years ago
7 0

Answer:

Student B's score has a greater variation from the mean than student A's score

Step-by-step explanation:

Student A : standard deviation = 5.4

Student B : standard deviation = 10.6

The standard deviation is used to measure the degree of variability of a measured value from the mean or average value of the set. The higher the value of standard deviation, the greater the variabilityabiut the mean. Hence for the question given above, Student B's score varies greatly from the mean Than student A's score.

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−3z+6b−7
Varvara68 [4.7K]

In −3z+6b−7, the first term is -3z. It's a variable term, since z is assumed to be a variable. The coefficient of this variable, z, is -3.

7 0
3 years ago
Is it more difficult to walk up the ramp or the hill? Show all steps and explain.
guajiro [1.7K]

Answer: the hill

Step-by-step explanation:

It has a bigger slope angle.

5 0
2 years ago
Read 2 more answers
In a study of 259 comma 995 cell phone​ users, it was found that 121 developed cancer of the brain or nervous system. Assuming t
IRISSAK [1]

Answer:

The probability of having 121 cases or less is:

P(X

This suggests that the study does not show any significantly effect of the use of cell phone in the probability of having brain or nervous system cancer. The use of cell phone does not appear to be a significant factor in the risk of having this type of cancer.

Step-by-step explanation:

We start by calculating the expected standard deviation of the population cases:

\sigma=\sqrt{n\pi(1-\pi)}=\sqrt{259,995*0.000489*0.999514}\\\\\sigma=\sqrt{126.29}\\\\\sigma=11.24

Then, to calculate the probability, we first calculate the z-score for 121 cases.

z=\dfrac{X-\mu}{\sigma}=\dfrac{121-127}{11.24}=\dfrac{-6}{11.24}=-0.5338

The probability of having 121 cases or less is:

P(X

This suggests that the study does not show any significantly effect of the use of cell phone in the probability of having brain or nervous system cancer. The use of cell phone does not appear to be a significant factor in the risk of having this type of cancer.

3 0
4 years ago
Is 31.669 an integer?
Nataly_w [17]

Answer:

No

Step-by-step explanation:

Integers are whole numbers 1, 2, 3, 4, so on and so on

5 0
3 years ago
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Somebody help me.......
Artemon [7]
In form y=mx+b
m=slope
b=y intercept

allso
in form ax+by=c
slope=-a/b
y intercept=c/b


see each one

A.
-2x+3y=-15
slope=-(-2)/3=2/3
yint=-15/3=-5
correct


B. slope=2/3
yint=-5
correct

C. divide both sides by 6 to get to slope intercept form
y=4/5x-5
y=2/3x-5
correct


D. distribute
y+3=2/3x-2
minus 3
y=2/3x-5
correct

all of them are correct
4 0
3 years ago
Read 2 more answers
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