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Slav-nsk [51]
3 years ago
13

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

tion is approximately ?=62.3?=62.3. You would like to be 95% confident that your estimate is within 2 of the true population mean. How large of a sample size is required?
Use a z* value accurate to TWO places for this problem. (Not z = 2)
n =________________.
Mathematics
1 answer:
Vinvika [58]3 years ago
4 0

Answer:

n= 3,727.590 = 3,728

Step-by-step explanation:

Given that,

Population standard deviation, σ=62.3

Margin of error, ME=2

95% confidence interval

The margin of error is defined as:  ME= Z0.05/2 × σ/√n

2 = 1.96×62.3/√n

√n = <u>1.96×62.3</u>

            2

√n = 61.054

n = 3,727.590 = 3,728

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I’m confused please help
Maru [420]
<h2>Hello!</h2>

The answer is:

Sin(A)=0.93

<h2>Why?</h2>

To solve the problem, remember to set your calculator in "degree mode"

So, we are given that the angle A is equal to 68°

So, we have that:

Sin(A)=Sin(68\°)=0.93

Hence, we have that:

Sin(A)=0.93

Have a nice day!

4 0
3 years ago
Question- Solve for a<br> 2a+b=x
kobusy [5.1K]

Answer:

a = (x - b)/2

Step-by-step explanation:

2a + b = x

-b         -b

2a = x - b

/2        /2

a = (x - b)/2

for ex:

x = 3

b = 2

a = ((3) - (2))/2 = 0.5

a = 0.5

2a + b = x

2(0.5) + 2 = 3

4 0
3 years ago
Solve the system of linear equations below 2x-y=0 3x-2y=-3
Lynna [10]
2x - y = 0
2x = y

3x - 2(2x) = -3
3x - 4x = -3
-x = -3
x = 3

2(3) = y
6 = y
3 0
3 years ago
Which number line correctly shows -3- 1.5?
solong [7]

Answer:

The first one

Step-by-step explanation:

3 0
2 years ago
Can someone help me with this<br>​
Schach [20]

The first graph the X is 45° because it right angle is 90 degrees Larry give us 55 degrees so 55 subtract the equals 45

The second graph has a degree of 113 because 180 subtracted by 67 is 113 because they straight angle has 180.

The first one is 45

The second one is 113

3 0
3 years ago
Read 2 more answers
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