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Leona [35]
3 years ago
14

find the size of each sample needed to estimate the difference between the proportions of boys and girls under 10 years old who

are afraid of spiders. Assume that we want a 95% confidence level and that the error is smaller than 0.03.
Mathematics
1 answer:
Alex Ar [27]3 years ago
6 0

Answer:

sample

Step-by-step explanation:

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Solve for m 1/C+1/m=1/z
9966 [12]
Answer:  " m = zC / (C − z) " .
___________________________________
Explanation:
_________________________
Given:  1/C + 1/m = 1/z ;  Solve for "m".

Subtract  "1/C" from each side of the equation:
____________________________________
1/C + 1/m − 1/C = 1/z − 1/C  ;

to get:  1/m = 1/z − 1/C ;
____________________________________
Now, multiply the ENTIRE EQUATION (both sides); by "(mzC"); to get ride of the fractions:
_________________

mzC {1/m = 1/z − 1/C} ;

to get:  zC = mC − mz ;

Factor out an "m" on the "right-hand side" of the equation:

zC = m(C − z) ;  Divide EACH side of the equation by "(C − z)" ; to isolate "m" on one side of the equation;

zC / (C − z) = m(C − z) / m ;  to get:   24/8 = 3  24

zC/ (C − z) = m ;   ↔   m = zC/ (C − z) .
___________________________________________________
4 0
3 years ago
HELP PLEASE ITS SO HARD IM CRYING PLS HELP
Vlad [161]

Answer:

I think it might be d

Step-by-step explanation:

Im not completely sure, BUT YOU GOT THIS

3 0
3 years ago
PLSSSSS ASAP!!!! Determine the perimeter of the rectangle shown below.
shutvik [7]

Answer:

D. 42 units

Step-by-step explanation:

The perimeter of the rectangular shown on the coordinate plane = sum of all it's four sides

= 2(length + width)

Length = 11 units

Width = 10 units

Plug in the values

Perimeter = 2(11 + 10)

= 2(21)

= 42 units

8 0
3 years ago
A.) Macy’s is having a Black Friday sale where everything is 30% off.
Mademuasel [1]

Answer: $126.00, the difference is 54.00

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
(a) the probability that a vampire bat would pick A (b) the probability that a vampire bat would pick C (c) the probability that
grin007 [14]

Answer:

See Explanation

Step-by-step explanation:

See attachment for complete question.

From the attachment, we have that:

A = 71

C = 121

T = 66

First, we calculate the total

Total = A + C + T

Total = 71 + 121 + 66

Total = 258

Solving (a): Probability of A

This is calculated using:

Probability = \frac{A}{Total}

Probability = \frac{71}{258}

Probability = 0.275

Solving (b): Probability of C

This is calculated using:

Probability = \frac{C}{Total}

Probability = \frac{121}{258}

Probability = 0.469

Solving (b): Probability of T

This is calculated using:

Probability = \frac{T}{Total}

Probability = \frac{66}{258}

Probability = 0.256

3 0
3 years ago
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