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IrinaK [193]
3 years ago
9

Suppose that, in order to estimate the proportion of students who wear glasses, a sample of 100 students was collected and showe

d that 20 of the students in the sample wore glasses. a confidence interval for the population proportion of students who wear glasses is given by: .200 +/- 3.000(.040) or .080 to .320. (note that the standard error is .040.) what is the confidence level of this confidence interval?
Mathematics
1 answer:
Tomtit [17]3 years ago
7 0
99.7 because the multiplier is 3.00
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The length of a pencil is 128 mm correct to the nearest
Cloud [144]
128 mm is the corrrect but not corre I by score u should.
4 0
2 years ago
Old Mc Donald raises ducks and cows. The animals have a total of 100 heads and 354 feet. How many ducks and how many cows does O
dlinn [17]

Answer:

The number of ducks Old Mc Donald raises are 23 and the number of cows Old Mc Donald raises are 77.

Step-by-step explanation:

We are given that Old Mc Donald raises ducks and cows. The animals have a total of 100 heads and 354 feet.

Let the number of ducks Old Mc Donald raises be 'x' and the number of cows Old Mc Donald raises be 'y'.

So, according to the question;

  • The first condition states that the animals have a total of 100 heads, that means;

                                   x+y=100

                                    x=100-y  -------------------- [equation 1]

{because one head of a duck and one head of cow}

  • The second condition states that the animals have a total of 354 feet, that means;

                                   2x+4y=354

                                   x+2y=177   --------------- [equation 2]

{because there are two feet of a duck and four feet of cow}

Now, putting the value of x in equation 2 we get;

                                  100-y+2y=177

                                  y=177-100

                                    y = 77 cows

Putting this value of y in equation 1 we get;

                                 x = 100 - y

                                 x = 100 - 77 = 23 ducks

Hence, the number of ducks Old Mc Donald raises are 23 and the number of cows Old Mc Donald raises are 77.

4 0
3 years ago
Complete the equation of this line in slope-intercept form y= _x-1
Andre45 [30]

Answer:

it will be 3 hope that helps

4 0
3 years ago
K(x) = 6x+100 k(-5) =
kkurt [141]

Answer:

k(-5)=70

Step-by-step explanation:

The given function is

k(x)=6x+100

To find k(-5), we put x=-5 into the given function to get;

k(-5)=6(-5)+100

Multiply out to obtain;

k(-5)=-30+100

This is the same as;

k(-5)=100-30

This simplifies to

k(-5)=70

3 0
3 years ago
yall its an easy khan academy assignment please help ASAP i needa turn it in by 11:59 pm todayyy so hurry i will give 50 points!
MariettaO [177]

Answer:

The answer is B.

Step-by-step explanation:

6 0
3 years ago
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