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makkiz [27]
3 years ago
5

Suppose that the population of the scores of all high school seniors that took the SAT-M (SAT math) test this year follows a Nor

mal distribution, with mean μ and standard deviation σ = 100. You read a report that says, "On the basis of a simple random sample of 100 high school seniors that took the SAT-M test this year, a confidence interval for μ is 512.00 ± 25.76." The confidence level for this interval is
Mathematics
1 answer:
abruzzese [7]3 years ago
4 0

Answer:

The confidence level for this interval is 99%.

Step-by-step explanation:

The margin of error M has the following equation.

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

z is related to the confidence level.

In this problem:

M = 25.76, \sigma = 100, n = 100

So

25.76 = z*\frac{100}{\sqrt{100}}

10z = 25.76

z = 2.576

Looking at the z table, z = 2.576 has a pvalue of 0.995.

So the confidence level is:

1 - 2(1 - 0.995) = 1 - 0.01 = 0.99

The confidence level for this interval is 99%.

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AND<br> - 4x + 3 &lt; -6<br> 12.c<br> · 39 &lt; 9
Scilla [17]

Answer:

the answer is 30 u were close u idiot but you aren't good enough dorry but u Americans are stupid and hell

scam

3 0
3 years ago
Lin's teacher uses the box to store her set of cubes with an edge length of one half inch. if the box is completely full, how ma
nlexa [21]

Answer:

448 cubes

Step-by-step explanation:

Volume of cubes fitted in the box will be equal to the cumulative volume of the cubes.

Since, volume of a cube = (Side)³

Side of the cube = \frac{1}{2} inch

Therefore, volume of the cube = (\frac{1}{2})^3=\frac{1}{8} inches

Volume of the storage box = 56 cubic inches

Since, number of cubes fitted in the storage box = \frac{\text{Volume of the storage box}}{\text{Volume of one cube}}

                                                                                 = \frac{56}{\frac{1}{8}}

                                                                                 = 56 × 8

                                                                                 = 448 cubes

Therefore, number of cubes fitted in the storage box = 448

3 0
3 years ago
Can someone help me with numbers 4-7 please!! Thank you so much!!
Sever21 [200]
4. positive. 5.zero. 6.undefined. 7. negative
7 0
3 years ago
A trimaran boat, with a top speed of 55 knots, won the tournament cup in 2010. Its top speed is 6 knots more than 3.5 times the
slavikrds [6]

Answer:

14 knots

Step-by-step explanation:

We know the speed (55 knots) is 6 more than 3.5 times the winner of the monohull in the 2007 tournament.

So let's set the variable for the speed of the monohull to <em>m</em>. Now, let's set up an equation:

55 = 6 + (3.5 * m)

We can solve this by first subtracting 6 from both sides to get:

49 = 3.5 * m

Dividing both sides by 3.5 we get:

14 = m

That means that the top speed of the monohull in the 2007 tournament was 14 knots

4 0
3 years ago
What would 9c-6+c be as an equivalent expression
pshichka [43]
-6+10c 
I think, reorder the terms: -6+9c+c= -6+10c
8 0
3 years ago
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