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Luden [163]
2 years ago
8

The essay lengths of 29 randomly sampled essays are used to estimate the mean of the population. What t-score should be used to

find the 95% confidence interval for the population mean? g
Mathematics
1 answer:
slavikrds [6]2 years ago
5 0

Answer:

A t-score of 1.701 should be used to find the 95% confidence interval for the population mean

Step-by-step explanation:

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 29 - 1 = 28

Now, we have to find a value of T, which is found looking at the t table, with 28 degrees of freedom(y-axis) and a confidence level of 0.95(t_{95}). So we have T = 1.701.

A t-score of 1.701 should be used to find the 95% confidence interval for the population mean

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Can someone help me please!
erica [24]

9514 1404 393

Answer:

  B, C, E

Step-by-step explanation:

Distributing the minus sign in the given expression results in ...

  6x +1 -3x -(-1)

  6x +1 -3 +1 . . . . simplify

The two expressions that show the constant terms as +1 - 1 are erroneous. The two constant terms are +1 -(-1) or +1 +1.

The correct expressions are the 2nd, 3rd, and 5th ones (b, c, e).

5 0
2 years ago
Evaluate each expression if a = 6, b = 3, and c = 2.
My name is Ann [436]

Answer:

1. 18

2. 6

3. ?

4. 3

5. 4

6. 1

7. 5

Step-by-step explanation:

1. 6 x 3 = 18

2. 2 + 4 = 6

3. ( I cant read the problem)

4. 6 - 3 = 3

5. 2 x 2 = 4

6. 3 ÷ 3 = 1

7. 6 - 1 = 5

8. 6 + 2 = 8

7 0
2 years ago
Lindsay is creating a bridge out of dried pasta and glue. In her plans, she sketches the graph to determine the lengths of the n
alexgriva [62]
From the graph shown it can be seen that the bridge is represented by a parabola with vertex of (5, 8) and roots of 1 and 9.

Recall that the vertex form of the equation of a parabola with vertex (h, k) is given by
y=a(x-h)^2+k

Thus, the equation of the given graph in vertex form is given by
y=a(x-5)^2+8

Also, recall that the equation of a parabola with roots, p and q, is given by
y=a(x-p)(x-q)

Thus the equation of the given graph can be given by
y=a(x-1)(x-9)

To get the value of a, we equate both equations and solve as follows:
a(x-5)^2+8=a(x-1)(x-9) \\  \\ a(x^2-10x+25)+8=a(x^2-10x+9) \\  \\ ax^2-10ax+25a+8=ax^2-10ax+9a \\  \\ 25a-9a=-8 \\  \\ 16a=-8 \\  \\ a=- \frac{8}{16} =- \frac{1}{2}

Therefore, the <span>function that Lindsay used to create her design is
f(x)=-0.5(x-5)^2+8
</span>
4 0
3 years ago
Read 2 more answers
PLEASE HELP!<br> DUE SOON STEP BY STEP PLEASE PLEASE HELP ASAP
levacccp [35]

Answer:

Step-by-step explanation:

yep your correct :)

8 0
3 years ago
Solve radicals:
aleksandr82 [10.1K]
1: 2/7 (I think)

2: √2 −3
——
3
(Number 2 is probably difficult but the two lines underneath is where the number is supposed to be)

3: 4√10
—
15

Explanation: Simplify the radical by breaking the radicand up into a product of known factors, assuming positive real numbers.


(I hope this helps and is correct)
5 0
2 years ago
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