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solong [7]
2 years ago
11

Ezekiel wants to use a one-sample z interval to estimate the proportion of seniors at his school who have a smartphone. He takes

an SRS of 20 of the 100 total seniors and finds that 12 of those sampled have a smartphone. Which conditions for constructing this confidence interval did Ezekiel's sample meet?
Choose all answers that apply:
Mathematics
2 answers:
Snezhnost [94]2 years ago
8 0

Answer:

answer is A

Step-by-step explanation:

"The data is a random sample from the population of interest.

This condition is met since he took an SRS (simple random sample) from the population of interest."

khan academy (trust me i try to find the answer might as well just give it, it was the only green one)

Ksivusya [100]2 years ago
7 0

Answer:

A. The data is a random sample from the population of interest.

Step-by-step explanation:

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Pls help<br><br> Given: △ABC, CM⊥ AB, BC = 5, AB = 7<br> CA = 4 sqrt(2)<br> Find: CM
babymother [125]

Answer:

The general plan is to find BM and from that CM. You need 2 equations to do that.

Step One

Set up the two equations.

(7 - BM)^2 + CM^2 = (4*sqrt(2) ) ^ 2 = 32

BM^2 + CM^2 = 5^2 = 25

Step Two

Subtract the two equations.

(7 - BM)^2 + CM^2  = 32

BM^2 + CM^2         = 25

(7 - BM)^2 - BM^2 = 7               (3)

Step three

Expand the left side of the new equation labeled (3)

49 - 14BM + BM^2 - BM^2 = 7    

Step 4

Simplify And Solve

49 - 14BM = 7              Subtract 49 from both sides.

-49 - 14BM = 7 - 49

- 14BM = - 42              Divide by - 14

BM = -42 / - 14

BM = 3

Step  Five

Find CM

CM^2 + BM^2 = 5^2

CM^2 + 3^2 = 5^2        Subtract 3^2 from both sides.

CM^2 = 25 - 9            

CM^2 = 16                     Take the square root of both sides.        

sqrt(CM^2) = sqrt(16)

CM = 4    < Answer

Step-by-step explanation:

6 0
2 years ago
If 5 is subtracted from the square of a number ,the result is 4 , find the number.
Levart [38]

Answer:

9 I think

Step-by-step explanation:

I added 5 plus 4 to get 9 but I'm really not sure but I hope i helped!

7 0
3 years ago
Help me please ! Thank you
andreev551 [17]
D I think that’s the answer as dark chocolate takes longer to melt then white
4 0
3 years ago
Read 2 more answers
Tom saves $5 each month. at this rate, how many months will he need to save $20?
alexira [117]
5x = 20...where x = number of months
x = 20/5
x = 4...it would take Tom 4 months to save $20
5 0
3 years ago
Read 2 more answers
Write the slope- intercept form of the equation of the line passing through the point (3,5) and parallel to the line y=3x+6.
seropon [69]

Answer: The gradient of the line passing through is 3, thus the equation of the line becomes y=3x-4.

Step-by-step explanation: The parallel lines gradients that have similar gradients, so now we have the gradient of 3 because its similar to the other gradient. To get the equation of the line we use this equation: y=mx+c, we have to substitute the x and y to get the constant c.

5=3(3)+c

c= -4

y=3x+c

3 0
3 years ago
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