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Crazy boy [7]
3 years ago
11

I'm not sure how to do this

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
5 0
It's A because if you divide any number of hours and it's corresponding distance from data table shown in A by a number to get one hour you get a distance of 25 kilometers, for example ; 2 hours and 50 kilometers, divide it by 2 to get 1 hour and 25 kilometers. Or 6 hours and 150 kilometers divided by 6 to get 1 hour and 25 kilometers Therefore it is 25 kilometers per hour .
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The American Management Association is studying the income of store managers in the retail industry. A random sample of 49 manag
VashaNatasha [74]

Answer:

a) The 95% confidence interval for the income of store managers in the retail industry is ($44,846, $45,994), having a margin of error of $574.

b) The interval mean that we are 95% sure that the true mean income of all store managers in the retail industry is between $44,846 and $45,994.

Step-by-step explanation:

Question a:

We have to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a p-value of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

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

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

M = 1.96\frac{2050}{\sqrt{49}} = 574

The lower end of the interval is the sample mean subtracted by M. So it is 45420 - 574 = $44,846.

The upper end of the interval is the sample mean added to M. So it is 45420 + 574 = $45,994.

The 95% confidence interval for the income of store managers in the retail industry is ($44,846, $45,994), having a margin of error of $574.

Question b:

The interval mean that we are 95% sure that the true mean income of all store managers in the retail industry is between $44,846 and $45,994.

5 0
3 years ago
2(7x-34) = 22<br> Find X<br> Brainliest
Zepler [3.9K]

Answer: x = 45/7

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
What is the value of 11g - 9k + 3 when g = 9 and k = 11?<br> Neatly show your work.
fenix001 [56]

Answer:

3

Step-by-step explanation:

11g - 9k + 3

Let g = 9 and k =11

11 * 9 - 9*11 +3

Multiply

99 - 99 +3

Add

3

4 0
2 years ago
Read 2 more answers
PLEASE HELPPPP IM STRUGGLING FR
MAVERICK [17]

Answer:

I think it's answer is B, A rotation around point 0 and then a reflection

3 0
2 years ago
Read 2 more answers
Russell wants to purchase a computer that costs $1575. With a larger monitor, the cost of the computer will go up 8%. How much w
lesya [120]

First, we need to find 8% of 1,575. To do so we have to divide 8 by 100, then multiply the quotient by 1,575.

8% ⇒ 0.08

1,575 × 0.08 = 126

Now add the 8% increase to the original cost.

1,575 + 126 = 1,701

<h2>Answer:</h2>

<u>Option 1: </u><u>$1,701</u><u>.</u>

I hope this helps :)

8 0
2 years ago
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