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levacccp [35]
3 years ago
15

A 90 % confidence interval for the average salary of all CEOs in the electronics industry was constructed using the results of a

random survey of 45 CEOs. the interval was ($133, 306, $150, 733). To make useful inferences from the data, it is desired to reduce the width of the confidence interval. Which of the following will result in a reduced interval width?
A) Increase the sample size and increase the confidence level.
B) Decrease the sample size and increase the confidence level.
C) Decrease the sample size and decrease the confidence level.
D) Increase the sample size and decrease the confidence level.
Mathematics
1 answer:
alisha [4.7K]3 years ago
8 0

Answer: D) Increase the sample size and decrease the confidence level.

Step-by-step explanation:

A reduced interval width means that the data is more accurate. This can only be achieved if the sample size is increased because a larger sample size is able to capture more of the characteristics of the variables being tested.

A smaller confidence interval will also lead to a reduced interval width because it means that the chances of the prediction being correct have increased.

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icang [17]

Answer:

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Step-by-step explanation:

the slope is always the ratio of

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in our case, x is the time (minutes), and y is the water height (inches).

we see, the longer the pool get filled, the higher the water gets. logical, right ?

by checking the data points we see :

with every 2 minutes passing the water height increases by 4 inches.

so, the slope is +4/+2 = 2/1 = 2

and that ratio tells us now the increase of the water height with every fraction or multiple of the measured 2-minute interval.

every 2 minutes 4 inches more.

so, e.g. every 3×2 = 6 minutes we get 3×4 = 12 inches more.

and - every 1/2 × 2 = 1 minute more we get 1/2 × 4 = 2 inches more.

4 0
2 years ago
What is the range of this function?
Bad White [126]

The range is the set of all y-coordinates.

R = {2, 6, 8}

4 0
3 years ago
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Answer:

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Someone please help me im in the middle of my quiz
ZanzabumX [31]

Answer:

the answer is B. you're welcome

8 0
2 years ago
How do you solve this problem for me please
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