In a statistics activity, students are asked to determine if there is a difference in the proportion of times that a spinning penny will land with tails up, and the proportion of times a spinning dime will land tails up. The students are instructed to spin the penny and the dime 30 times and record the number of times they land tails up. For one student, the penny lands tails side up 18 times, and the dime lands tails side up 20 times.

Based on the 98% confidence interval, (–0.36, 0.22), is there evidence of a difference in proportions of tails side up for a penny and a dime?

There is convincing evidence because the two sample proportions are different.

There is not convincing evidence because the interval contains 0.

There is not convincing evidence because the interval contains both negative and positive values for the true difference.

Answers

Answer 1

Answer: B) There is not convincing evidence because the interval contains 0.

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

Explanation:

The 98% confidence interval (-0.36, 0.22) means we are 98% confident that the difference of proportions p1-p2 is somewhere between those two endpoints of -0.36 and 0.22 Values in this interval are possible values of p1-p2.

Note how 0 is in this interval. So it's possible that p1 - p2 = 0. Because of this, we fail to reject the null hypothesis. The null in this case is that p1 - p2 = 0 which can be restated as p1 = p2. The null is the assumption that the two population proportions (p1 and p2) are the same.

The alternative hypothesis is that p1-p2 is not zero. If we got a confidence interval like (0.22, 0.55), this example doesn't have 0 in the interval, then that would mean we reject the null since its unlikely that p1-p2 is equal to zero.

----------------

In short,

If the confidence interval contains 0, then you fail to reject the nullIf the confidence interval doesn't contain 0, then you reject the null.

In this case, we fail to reject the null and we don't have enough evidence to show that p1 = p2 is false. So for now, we assume it's true.


Related Questions

Helllppp!!!
All statements of equality below are correct.


A. True
B. False

Answers

Answer:

DONUT WORRY IT SHOULD BE FALSE BECAUSE IMEADIATLY THE FIRST ONE = 7

Step-by-step explanation:

8. Let angle A and angle B be acute angles in two right triangles. Calculate the angle and
round to the nearest tenth of a degree.
a. sin A = 0.87
b. cos B = 0.15

Answers

9514 1404 393

Answer:

  a. 60.5°

  b. 81.4°

Step-by-step explanation:

Inverse functions are used to find the angle value for a given trig function value.

a) arcsin(0.87) ≈ 60.5°

b) arccos(0.15) ≈ 81.4°

__

On many calculators, these functions are accessed using a 2nd or Shift key. They are often labeled as sin⁻¹ and cos⁻¹. The calculator will have a mode setting that needs to be set to "Degrees" if you don't want the angle in radians or grads.

Find x if m Plz Help

Answers

Thee is not a x or a m

5: You should (......) before the beginning of each paragraph when you are reading.

answers:

1: history
2: terror
3:apology
4:Pause

Answers

Answer:

4:Pause

Step-by-step explanation:

Before starting the reading of each paragraph you should pause as it does not create misunderstanding between the people also each and every paragraph should be clear to everyone so the chances of doubt would be minimum

Therefore according to the given options the fourth option is correct

Hello!

The answer is pause.

All the other options are nouns, but it's clear that we need a verb.

So, the answer is pause.

Hope it helps! :)

Do ask me if you have any query.

~An excited gal

[tex]MagicalNature[/tex]

Rewrite each expression by combining like terms.
13p - 4p + 6q

Answers

Answer:

You answer would be 15p

Step-by-step explanation:

13p - 4p + 6p

9p + 6p

15p

Answer:

9p + 6q

Step-by-step explanation:

Rewrite each expression

Combine like terms

13p - 4p + 6q

_____________________

When we have like terms, we can only add the ones that have the same symbols as endings, such as variables, exponents, etc. Therefore :

Add "p" values together :

13p - 4p

9p.

Now rewrite the expression, we cannot combine like terms with "p" and "q" because they are not the same variable :

9p + 6q

Choose x = 1.8 or x = 2.4 to tell if either value is a solution to each equation.

Answers

Answer:

The answer should be "Yes, value is a solution to each equation because both equations are being doubled/broken down"

Hope this helped!

<3

PLS HELLLPPP MEEEE ASAP!!!!!

Answers

Answer:

you want to be a friend se you want me to be a good

Answer:

1. 7.1 in

2. 46.6 ft

3. 91.7 ft

4. 12

Step-by-step explanation:

All pythagorean theroem questions so a^2+b^2=c^2

What is the remainder when the following polynomial is divided by (x+2)? f (x) = 3x^5 - 2x^3 + 4x-7

Answers

Answer:

remember me?

Step-by-step explanation:

if candies are sold at 3 pcs for php.2.00.how many candies can melai get if she has php20.00?​

Answers

If you’re saying that 3 pieces costs 2.00 then the answer is 30. 2x10 is the $20.00 so 3x10 = 30 she can buy

PLEASE HELP
5.Two mechanics were working on your car. One can complete the given job
in six hours, but the new guy takes eight hours. They worked together for
the first two hours, but then the first guy left to help another mechanic on
a different job. How long will it take the new guy to finish your car?

Answers

I hope this is right, but I think it should take a remaining six hours for the new guy to fix your car. He worked on it for two hours with the other mechanic, but it still takes him 8 hours total to fix the car. So he still has six more hours to fix your car. Again, I hope this is right.

PLZ HELP COME ON I NEED HELP 50 points

Answers

Answer:

9. -6x+10

10. -24x +18y

11. 15y - 10z

12. -8x- 28

13. -7x + 14

14. -24x +12

Step-by-step explanation:

9) -6x+5

10)-24x+18y

11)15y-10z

12)-8x-28

13)-7x+14

14)-24x+12

I think those are the answers since ur using the distributive property

find the exact value of tan 2x if sin x = -4/5. (Quadrant III)

Answers

Answer:

sin x = -0.8

x = -53.13010235 (used inverse of sin)

tan 2x

tan -106.2602047

= 0.61854704132

Which BEST describes a right prism?
es )
A)
all bases are right triangles
B)
all faces are right triangles
C)
all bases are rectangular
D)
all faces are rectangular

Answers

the answer is C i just did it
Your answer is definitely C

Which equation illustrates dividing out a common factor as the first step to solve the equation 2 x + 4 = 6 x + 2 ? A. 2 ( x + 2 ) = 2 ( 3 x + 1 ) B. 2 x 2 + 2 2 = 6 x 2 + 2 2 C. 2 x 2 + 4 = 6 x 2 + 2 D. 2 x + 4 2 = 6 x + 2 2

Answers

Answer:

Step-by-step explanation:

2x + 4 = 6x + 2

Bringing like terms on one side

4 - 2 = 6x - 4x

2 = 2x

2/2 = x

1 = x

find the median of the numbers

Answers

Answer:

8

Step-by-step explanation:

There are 3 numbers on each side of 8, which makes 8 the median because it is in the middle.

The answer is 8.
if there are an even number on each side it leaves the middle number to be the median.



Which equation of the least squares regression line most closely matches the data set?


yˆ=−0.31x+37.3

yˆ=−0.09x+11.5

yˆ=−10.1x+118.8

yˆ=−2.3x+97.9

Answers

Answer:

I can confirm that the answer above is correct.

Step-by-step explanation:

Hope this helps. :D

The equation of the least squares regression line which is most closely matches the data set is yˆ=−10.1x+118.8

What is linear regression?

Linear regression is a type of regression which is used to model the data having linear relationship between the variables. The regression line can be given as,

[tex]\hat y=bX+a[/tex]

The data given in the problem is,

x       2    4    6    8   10y    100  83  50 35  23

Mean of x and y values,

[tex]\mu_x=\dfrac{2 +4 +6 +8 +10}{5}=6\\\mu_y=\dfrac{100 +83 +50 +35 +23}{5}=58.2[/tex]

Here, in this data points, the sum of the squares is 40 and sum of the products is -404. The value of b is,

[tex]b=\dfrac{-404}{40}\\b=-10.1[/tex]

The value of a is,

[tex]a=58.2-(10.1\times6)\\a=118.8[/tex]

Put the values in the above equation,

[tex]\hat y=-10.1X+118.8a[/tex]

Thus, the equation of the least squares regression line which is most closely matches the data set is yˆ=−10.1x+118.8

Learn more about the linear regression here;

https://brainly.com/question/25226042

#SPJ2

Which situation is modeled by the graph?
Height
Time

Answers

Answer:23

Step-by-step explanation:

bishwant and sunayana cimplete a oiece of a work in 6 days working together.if bishwant alime can complete it n 10 days.in how many days would sunayana alon3 complete the work

Answers

Step-by-step explanation:

sunaina's alona work=

1/6-1/10

10-6/60

4/60

1/15

therefore sunaina can alone do the work in 15 days

What does it mean when 6 people share 12 muffins

Answers

Answer:

Each person gets 2 muffins

Step-by-step explanation:

12 divided by 6 is 2

It means that those six people are sharing twelve muffins meaning each of them get two muffins. Have a good day:)

Which pair of statements about the lengths of two sides of the triangle?

!!! pls help !!!
(Sorry for the blurry photo)​

Answers

I’m pretty sure it’s C and if I’m wrong I’m very sorry I probably did some math wrong

it's A

between J and L it 3 units

between L and K it 4

Please help. Look at the triangle below.

Answers

Answer:

See below.

Step-by-step explanation:

Side BC is adjacent to <B and is 11 units long.

Side BA is the hypotenuse and is x units long.

Give an example for a statistical question and a non statistical question.

Answers

Statistical questions can have more than one possible answer. Non statistical questions has only one answer.
A statistical question:
Do dogs run faster than cats?
Non statistical question:
How old are you?
I hope this helped. If it did, I would appreciate if you can give me brainliest

) tan c
С
45
36
B.
27
A
4/3
3/5
Ο Ο Ο Ο Ο
27/45
314
4/5

Answers

Answer:

A 4/3 3/5 000000 27/45 314 4/5

Solve for X. assume that lines Which appear tangent are tangent.

Answers

Answer:

x = 4, x = 8

Step-by-step explanation:

(9)

Given 2 secants from an external point to the circle, then

The product of the external part and the whole of one secant is equal to the product of the external part and the whole of the other secant, that is

x(x + 6) = 5(5 + 3)

x² + 6x = 5 × 8 = 40 ( subtract 40 from both sides )

x² + 6x - 40 = 0 ← in standard form

(x + 10)(x - 4) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 10 = 0 ⇒ x = - 10

x - 4 = 0 ⇒ x = 4

x > 0 then x = 4

(11)

Given a secant and a tangent from an external point to the circle, then

The square of the tangent is equal to the product of the external part and the whole of the secant, that is

x(x + 10) = 12²

x² + 10x = 144 ( subtract 144 from both sides )

x² + 10x - 144 = 0 ← in standard form

(x + 18)(x - 8) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 18 = 0 ⇒ x = - 18

x - 8 = 0 ⇒ x = 8

x > 0 then x = 8

x + 2y = 9
2x - y = 8

(5,2)
(1,4)
(4,-1)
(5, -2)
which one is it?

Answers

Answer:

(5,2)

Step-by-step explanation:

when you plug them in they appear true!

60.5/100 if the denominator is 100 and nominator is 60.5 what is percentage?​

Answers

The percentage would be 60.5%

In this diagram, ABAC – AEDF. If the
area of ABAC = 15 in2, what is the
area of AEDF?
D
E
4 in
F
B
5 in
Area = [?] in
Enter a decimal rounded to the tenths,
1

Plz help ive been on this for 2 hours.

Answers

Answer:

48/5in2=9.6in2 ~ 10in2

Simplify the expression. 2.9-4.2n - 2n + 5​

Answers

Answer:

https://images.app.goo.gl/bSiQyHjru1cN2gVa6

Answer:

-6.2n+7.9

Step-by-step explanation:

Which graph best represents y=−2x+3

Answers

Answer:

download graphing calc, it'll help u sm

Step-by-step explanation:

  °   •  .°•    ✯

   ★ *     °      °·                            

.   • ° ★ •  ☄

▁▂▃▄▅▆▇▇▆▅▄▃▁▂

PLEASE ANSWER THIS ILL GIVE BRAINLIEST

Answers

The answer is (-2,-5) in point form and in equation form the answer is x=-2 y=-5

Answer:

the answer is 2342

Step-by-step explanation:

because 7x add 2y = 2342

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