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Lapatulllka [165]
3 years ago
14

Suppose a stat 121 professor would like to predict the mean final exam score of the students who obtained 80% on exam 3. What ki

nd of interval should she use?
Mathematics
1 answer:
Montano1993 [528]3 years ago
3 0

Answer:

A confidence interval

Step-by-step explanation:

She could construct a confidence interval that would let her be confident to a certain level of the students scores on the final, based on their scores on Exam 3.  

She would have to calculate the standard deviation of the students who scored an 80.  The mean is 80 so we need not calculate that.  

She could then choose her level of confidence (90%, 95%, 99% are the most common), and construct an interval of scores.  

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Basile [38]

Answer:

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Step-by-step explanation:

8 0
3 years ago
FIRST PERSON TO ANSWER BRAINLIEST+POINTS, NEED TO EXPLAIN, ANSWER, AND GIVE AN EX.
Eddi Din [679]

Answer: 2nd diagram, explanation below

Step-by-step explanation:

Since it is 8 magnet students for 3 magic students, the second diagram is correct.

The second part, you would need to set up a system of equations:

Let m = magnet students and t = magic students

t + 25 = m

(8/3)t = m. Since m = m, substitute: t + 25 = (8/3)(t). Now solve for t: t = 8t/3 - 25,

t = (8t - 75)/3, in this step I turned 25 into 75/3 and place it with 8t so it doesn't change the value of the equation.

3t = 8t - 75, in this step I multiplied every term by 3 to eliminate the demoninator. Now I solve the final steps:

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5 0
1 year ago
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damaskus [11]

Answer:

4\sqrt[3]{7x}

Step-by-step explanation:

Look for the same stuff under the radical symbol. Here, that "stuff" is "7x". Only one answer choice has 7x under the radical.

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Here, there are no cubic factors under the radical that can be factored out—either in the problem expression or in the answer choices. If there were cubic factors, you'd want to remove them before making the comparison.

For example, ∛(56x) would be a like radical to ∛(7x) because a cubic factor of 2^3 = 8 can be removed to make it be 2∛(7x).

4 0
3 years ago
C is more than half of n
ycow [4]
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C > N/2
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3 years ago
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8_murik_8 [283]

Answer:

A.9

F.27

Step-by-step explanation:

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additional 27 times 2= 54

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3 years ago
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