PLEASE HELP ME!! THANK YOU ^-^ how would you graph x ≥ negative three and one half

HighTech Inc. randomly tests its employees about company policies. Last year in the 560 random tests conducted, 26 employees fai

Tanzania [10]

Answer:

The 98% confidence interval for the proportion of applicants that fail the test is (0.025, 0.067).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

560 random tests conducted, 26 employees failed the test. This means that $n = 560, \pi = \frac{26}{560} = 0.046$

98% confidence level

So $\alpha = 0.02$ , z is the value of Z that has a pvalue of $1 - \frac{0.02}{2} = 0.99$ , so $Z = 2.33$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.046 - 2.33\sqrt{\frac{0.046*0.954}{560}} = 0.025$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.046 + 2.33\sqrt{\frac{0.046*0.954}{560}} = 0.067$

The 98% confidence interval for the proportion of applicants that fail the test is (0.025, 0.067).

5 0

4 years ago

Which of the following values are in the range of the function graphed below? Check all that apply

Free_Kalibri [48]

D.

The equation is y = 1, so the only number of the range is 1

5 0

3 years ago

Read 2 more answers

What happens if jimmy has 4 apples and takes away 3?

barxatty [35]

Answer:

1

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Question 4 2 pts If a = -3, b = 2 and c = -4 find the value of the expression. a2 +b²

arsen [322]

Answer:

-2

Step-by-step explanation:

Order of Operations: BPEMDAS

Step 1: Define

a2 + b²

a = -3

b = 2

c = -4

Step 2: Substitute and Evaluate

2(-3) + 2²

-6 + 4

-2

4 0

3 years ago

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1. Which conjunction or disjunction is equivalent to the open sentence |a – 8| ≤ 3?. A. a – 8 ≤ 3 and a – 8 ≥ –3. B. a – 8 ≥ 3 a

pshichka [43]

The given expressions above are examples of an absolute-value inequality. In the expression |a – 8| ≤ 3, this is equal to -3 ≤ a - 8 ≤ 3. In this case, the answer here in 1 is A. a – 8 ≤ 3 and a – 8 ≥ –3. in 2, the expression is 4 – 2(n + 6) ≥ 2 or -8 -2n ≥ 2 or 4 + n ≤ -1 equal to n ≤ -5. The other equation is 4 – 2*-(n + 6) ≥ 2. 16 + 2n ≥ 2 or 8 + n ≥ 1. n ≥ -7. Answer is n ≤ -5 or n ≥ -7 .The equation |k + 6| = 3 is equal to k + 6 = 3 or k =-3 and k+6 =-3 equal to k = -9. Answer in 3 is C.

4 0

3 years ago

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PLEASE HELP ME!! THANK YOU ^-^how would you graph x ≥ negative three and one half