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Lerok [7]
3 years ago
7

Darin randomly selects a marble from a jar that contains only red and green marbles. Which of these could be the probability tha

t the marble is green? Choose all that are correct. A. 114 B. –0.08 C. 76 D. 1.04 E. 0.99 F. –0.65
Mathematics
1 answer:
Luden [163]3 years ago
8 0

Answer:

E

Step-by-step explanation:

There are both red and green marbles in the jar. The answer cannot be A or D because that would mean that there's 1.14% or 1.04% green marbles. But we know that there's less than that in the and bag. And there are also red marbles. B and F do not work because there can't be a negative amount of marbles in the bag.

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A​ 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense he
krok68 [10]

Answer:

The calculated value z = 2.65>1.64 at 90% of level of significance

we reject null hypothesis at 10 % level of significance

The therapists use a method is not equivalent to random guesses

<u>Step-by-step explanation:</u>

<u>Step1:-</u>

Given n = 279

Among 279 ​trials, the touch therapists were correct 118 times

Proportion of success 'p' = 118/ 279 = 0.4229

She flipped a coin to select either her right hand or her left​ hand

The Population proportion P = 1/2 = 0.5

level of  significance level ∝ = 0.10

Null hypothesis H₀: P =  0.5

Alternative hypothesis H1: P ≠  0.5

Q =1-P = 0.5

<u>Step2:</u>-

The z- statistic

Z = p-P/ S.E

where standard error of proportion

S.E = √PQ/n

S.E = 0.029

z = 0.4229-0.5/0.029 = -2.65

|z|=|-2.65|=2.65

<u>Conclusion</u>:-

The calculated value z = 2.65

The tabulated value z = 1.64 at 10% 0r 90% of level of significance

The calculated value z = 2.65>1.64 at 90% of level of significance

we reject null hypothesis at 10 % level of significance

The therapists use a method is not equivalent to random guesses                    

6 0
3 years ago
After finishing her shift , a waitress wrote 2.5 under "hours worked " on her time card .How long did she work?
aev [14]

Answer:

D. 2 hours and 30 minutes.

Step by step explanation:

60 minutes is an hour.

30 minutes is half an hour.

When she wrote 2.5, .5 is a half.

2 hours and 30 minutes.

Hope this helps & good luck!

Feel free to message me if you need more help! :)

3 0
4 years ago
Read 2 more answers
Find the area of a regular polygon.
a_sh-v [17]

Answer:

23.397 in ^2

Step-by-step explanation:

I just searched up hexagon area calculator and inputed the thing in and thats the answer if pi is 3.14

8 0
3 years ago
A day at the Amusement Park
Volgvan

Answer:

69 children

175 adults

Hope it may help u

Step-by-step explanation:

3.50/244

69

69-244

175

4 0
3 years ago
What is x and the Theorem? Someone please help asap!
kondor19780726 [428]

Answer:

x = 75

Step-by-step explanation:

Corresponding angles on the same side of the transversal are equal

10x + 5 = 12x - 9                    Add 9 to both sides

10x + 5 + 9 = 12x                   Combine

10x + 14 = 12x                         Subtract 10x from both sides

14 = 12x - 10x                         Combine

14 = 2x                                    Divide by 2

2x = 14

x = 14/2

x = 7

==================

10x + 5 = 10*7 +  5

10x + 5 = 75

12x - 9 = 12*7 - 9

12x - 9 = 84 - 9

12x - 9 = 75

3 0
4 years ago
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