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solniwko [45]
3 years ago
11

A random sample of 25 employees of a local company has been taken. A 95% confidence interval estimate for the mean systolic bloo

d pressure for all employees of the company is 123 to 139. Which of the following statements is valid?
(A) ​95% of the sample of employees has a systolic blood pressure between 123 and 139.
(B) ​If the sampling procedure were repeated many times, 95% of the resulting confidence intervals would contain the population mean systolic blood pressure.
(C) ​If the sampling procedure were repeated many times, 95% of the sample means would be between 123 and 139.
(D) ​95% of the population of employees has a systolic blood pressure between 123 and 139.
Mathematics
1 answer:
liraira [26]3 years ago
6 0

Answer:

(B) ​If the sampling procedure were repeated many times, 95% of the resulting confidence intervals would contain the population mean systolic blood pressure.

Step-by-step explanation:

A confidence interval of 95% means that there is a 95% certainty that for a given sample, the population mean will be within the confidence interval estimated.

This is the same as saying that if he sampling procedure were repeated many times, 95% of the time the population mean would be contained in the resulting confidence interval.

Therefore, the answer is B)

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Which of the given expressions results in 0 when evaluated at x = 5?
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Solve for x<br> x + y = 1<br> x + 7y = -4<br> 2x - 6y = 4<br> 5x + 15y = -10<br> 2x + 6y = 10
Arada [10]
X + y = 1
add - y both sides
x + y +  - y = 1 +  - y
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Answer: x =  - y + 1
Graph: y =  - x + 1


x + 7y =  - 4
add - 7 both sides
x + 7y +   - 7y = - 4 +  -7y
x =  - 7y  - 4
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2x  - 6y = 4
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2x  - 6y + 6y = 4 + 6y
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divide both sides by 2
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5x + 15y = - 10
add - 15 to both sides
5x + 15y +   - 15y = - 10 +  - 15y
5x = - 15y  - 10
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2x + 6y = 10
add - 6y to both sides
2x + 6y +  - 6y = 10 +  - 6y
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divide both sides by 2
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Hope that helps!!!
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Step-by-step explanation:

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Least common multiple of 2,7, and 13
san4es73 [151]


To work out the LCM, we need their prime factors. So:

2 is simple 2 x 1.

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We still have the 2, 7 and 13 leftover.

We then multiply the 1 with the other figures.

So 1 x 2 x 7 x 13 is our answer.

Which is = 182.


Hope I helped:)


~FabSafxo

6 0
3 years ago
Read 2 more answers
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