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puteri [66]
2 years ago
5

The mean number of hours of study time per week for a sample of 562 students is 23. If the margin of error for the population me

an with a 98% confidence interval is 2.1, construct a 98% confidence interval for the mean number of hours of study time per week for all students.
Mathematics
1 answer:
Vadim26 [7]2 years ago
3 0

Answer:

The 98% confidence interval for the mean number of hours of study time per week for all students is (20.9, 25.1).

Step-by-step explanation:

Confidence interval:

Sample mean plus/minus the margin of error.

In this question:

Mean of 23.

Margin of error 2.1.

Then

23 - 2.1 = 20.9

23 + 2.1 = 25.1

The 98% confidence interval for the mean number of hours of study time per week for all students is (20.9, 25.1).

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Figure 1 and figure 2 are two congruent parallelograms drawn on a coordinate grid as shown below:
LenKa [72]

Answer:

  (a)  Reflection across the y-axis, followed by translation 10 units down

Step-by-step explanation:

Figure 2 is not a reflection across the origin of Figure 1, so neither of the double reflections will map one to the other.

Reflection across the y-axis will put the bottom point at (5, 3). The bottom point on Figure 2 is at (5, -7), so has been translated down by 3-(-7) = 10 units.

Figure 1 is mapped to Figure 2 by reflection over the y-axis and translation down 10 units.

7 0
2 years ago
SOMEONE PELASE HELP ME ASAP! I REALLY NEED HELP ASAP
Stells [14]
Answer: below in picture

explanation: also in picture

6 0
3 years ago
What is the slope of the line that passes through the points (3,-5) and (1,-5)? Write in simplest form
Gre4nikov [31]

Answer:

The slope is apperently 5 and i rlly don't have a step-to-step explaintion but my teacher explained it and said it was 5 slopes.

Step-by-step explanation:

7 0
2 years ago
1. -7-(-2) *
Morgarella [4.7K]
1. -7-(-2)
= -7+2= -5

2. 5-(-3)
= 5+3=8

3. -6-4
= -6+(-4)= -10

4. -3-(-3)
= -3+3= 0
8 0
3 years ago
(10
Anni [7]

Given:

The matrix multiplication

\begin{bmatrix}4&5&6\\1&2&3\end{bmatrix}\begin{bmatrix}10\\20\\30\end{bmatrix}

To find:

The order of resulting matrix.

Solution:

We know that, if order of first matrix is m_1\times n_1 and the order of second matrix is m_2\times n_2, then the order of these two matrices is m_1\times n_2.

We have,

\begin{bmatrix}4&5&6\\1&2&3\end{bmatrix}\begin{bmatrix}10\\20\\30\end{bmatrix}

Here, the order of first matrix is 2\times 3 and the order of the second matrix is 3\times 1. So, the order of the second matrix is 2\times 1. It is also written are 2 by 1.

Therefore, the correct option is A.

6 0
3 years ago
Read 2 more answers
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