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alex41 [277]
3 years ago
5

A study was completed in Florida. In southern Florida, the study involved 3,000 patients; 54% of them experienced flulike sympto

ms during the same month. The study had a margin of error of 1.8%. What does that mean for the study? The confidence interval is between 52.2% and 55.8%. The confidence interval is between 50.4% and 57.6%. The confidence interval is between 53% and 55%. The confidence interval is between 30% and 97.2%.
Mathematics
1 answer:
polet [3.4K]3 years ago
6 0

Answer:

A (52,2%, 55,8%)

Step-by-step explanation:

To get the confidence interval, we have to add the margin of error to the point estimator.

The middle of the interval is 54%, and the ME is 1.8%. Don't forget that this means ±1.8%!

54 - 1.8 = 52.2%

54 + 1.8 = 55.8%

So our confidence interval is (52,2%, 55,8%) and the answer is A.

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Which of the following statement(s) describes the rate of change of f over the interval 1.5 ≤ x ≤ 3? Select all that apply.
Vesnalui [34]

2 Answers: Choice B and Choice C

The rate of change is 2.

The rate of change is constant.

======================================================

Explanation:

The first point on the left is when x = 1.5 and it has a height of y = 1

The point (1.5, 1) is on the line.

So is the point (3,4) for similar reasoning.

Compute the slope between those points

m = (y2-y1)/(x2-x1)

m = (4-1)/(3-1.5)

m = 3/(1.5)

m = 2

The slope is 2, which is the same as saying the rate of change is 2. This only applies when x > 1 of which the interval 1.5 ≤ x ≤ 3  is a part of.

Since the slope stays at 2 on the interval 1.5 ≤ x ≤ 3, this means we consider the slope to be constant. If the curve bended at all on this interval, then it wouldn't be a constant slope.

6 0
2 years ago
Please help! I'm having problems with deciding if 2.80 would be 2 or less or 2 or more.
Gekata [30.6K]

2.80 is more than 2, i would round it.

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7 0
3 years ago
The sum of 6 consecutive even numbers is 126.<br> What is the fourth number in this sequence?
lilavasa [31]

Answer:

The 6 numbers are: 16, 18, 20, 22, 24, and 26 so the answer would be 22.

4 0
3 years ago
Find the constant of proportional (r) in the equation y = rx​
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Answer:

Constant of proportionality,  

Step-by-step explanation:

Constant of proportionality states that the constant value of the ratio of two proportional quantities x and y,

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Given the equation:                         .....[1]

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From the table we consider

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Divide both sides by 14 we get;

therefore, the Constant of proportionality,  

4 0
3 years ago
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