Words were displayed on a computer screen with background colors of red and blue. Results from scores on a test of word recall are given below. Use a significance level to test the claim that the samples are from populations with the same standard deviation. Assume that both samples are independent simple random samples from populations having normal distributions. Does the background color appear to have an effect on the variation of word recall​ scores?
n
s
Red Background
Blue Background
What are the null and alternative​ hypotheses?
A.
​:
​:
B.
​:
​:
C.
​:
​:
D.
​:
​:
Identify the test statistic.
F
nothing ​(Round to two decimal places as​ needed.)
Use technology to identify the​ P-value.
The​ P-value is
nothing. ​(Round to three decimal places as​ needed.)
What is the conclusion for this hypothesis​ test?
A.
. There is evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation.
B.
. There is evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation.
C.
. There is evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation.
D.
. There is evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation.
Does the background color appear to have an effect on the variation of word recall​ scores?
A.
​, the variation of word recall scores appears to be when the color is changed.
B.
​, the variation of word recall scores appears to be when the color is changed.
C.
​, the variation of word recall scores appears to be when the color is changed.
D.
​, the variation of word recall scores appears to be when the color is changed.

Answer:

i think this is the answer

Step-by-step explanation:

[tex]4.302(20) - 3.293 = 82.747[/tex]

The mean value of the response variable is 82.747.

Linear Regression calculates the equation of the line that is the best fit for the given data points. Linear regression models a linear relationship between the input variable x and the output variable y.

Here, given regression line;

        y= 4.302x - 3.293    ...............(i)

Now, value of x is given; x = 20

Put the value of x in equation (i), we get

     y = 4.302 X 20 - 3.293

     y = 86.04 - 3.293

     y = 82.747

Thus, the mean value of the response variable is 82.747.

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Answer:

3/4

Step-by-step explanation:

The value of cos C x sin A is 3/2.

It is a two-dimensional figure which has three sides and the sum of the three angles is equal to 180 degrees.

We have,

AB = 1

AC = 2

BC = √3

Now,

∠B = 90°

∠A = 60°

∠C = 180 - (90 + 60) = 180 - 150 = 30°

cos C = cos 30° = √3 / 2

sin A = sin 60° = √3/2

Now,

Cos C x Sin A

= √3/2 x √3 / 2

= 3/2

Thus,

The value is 3/2.

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Answer: B

Step-by-step explanation:

Answer:

The complex solution would be: X = 5,1

Step-by-step explanation:

Answer:

x=1

TRUE because Factoring  x2-6x+5

The first term is,  x2  its coefficient is  1 .

The middle term is,  -6x  its coefficient is  -6 .

The last term, "the constant", is  +5

Step-1 : Multiply the coefficient of the first term by the constant   1 • 5 = 5

Step-2 : Find two factors of  5  whose sum equals the coefficient of the middle term, which is   -6 .

     -5    +    -1    =    -6    That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -5  and  -1

                    x2 - 5x - 1x - 5

Step-4 : Add up the first 2 terms, pulling out like factors :

                   x • (x-5)

             Add up the last 2 terms, pulling out common factors :

                    1 • (x-5)

Step-5 : Add up the four terms of step 4 :

                   (x-1)  •  (x-5)

            Which is the desired factorization

Answer:

Step-by-step explanation:

a)

The mistaken assumption is that Apple spends "far less" on Research and Development than any of its rivals.

b)

The assumption is incorrect because it took cognizance of the percentage used, and not the actual money spent. In truth, Apple generates far more income than the other two rivals. With Apple generating over $100bn in the said time span, and Google generating $37bn. At the end of the day, Apple spends $2.1bn on Research and Development, while Google spends $5.3bn on the same. This is quite close than the quoted distance of 14% - 2%

c)

Yes, I think so. But only when the 3 companies generate almost the same revenue.

Based on the description of the headline given in the scenario, the solution to the problems posed are :

A.)

The mistake in the assumption is that, the headline focused just on the percentage of the revenue made by each company that is spent on R&D.

B.)

The assumption is incorrect because, the revenue generated by the companies aren't the same. Hence, making comparison based on the percentage alone is incorrect.

C.)

The headline may be correct only when the revenue generated by each company is the same.

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Answer:

A. is the correct answer.

Hope I helped.

Answer:

16 this is the answer to your question

Answer:

Step-by-step explanation:

8+8=16

Count all the slashes together

(////////)+(////////)=16 slashes

Answer:

15 m, but it depends on your shape?

Step-by-step explanation:

cuboid?

if so

area= 2(lb+bh+lh)

2(4*5+5*6+4*6)

2(74)

answer = 148 m sq.

Answer:

1201

Step-by-step explanation:

Answer:

1200

Step-by-step explanation:

Answer:

40 x 30 = 1200 pages

Step-by-step explanation:

I hope this helps :)

Answer: Im confused?

Step-by-step explanation:

Answer:

True

Step-by-step explanation:

When you distribute the 3, you get x(2x3)-(12x3)

2x3=6

12x3=36

so 6x-36

and that is equivalent to the first expression.

Answer: what you need to do is multiply 3 times 1 and add 2 to the sum that you get which would be 5/3 for the first one because you keep the same denominator! Just multiply the denominator the bottom number and add the numerator the top number to your sum that you got from multiplication! Do that for all of them and you should get an improver fraction!

:)

Finding the reciprocal is easy just flip the numbers I’m in 6th grade I learn this already!

For example just flip 3/7 to 7/3

Answer:

1. 5/2 2. 18/5 3. 35/5 4. 38/3 5. 72/7 1. 7/3 2. 3/8 3. 1/9 4. 8/33 5. 3/44

Step-by-step explanation:

to make mixed numbers into improper fractions, you multiply the whole number by the denominator, and add the numerator. you take that answer and make it the numerator in the new improper fraction, and keep the same denominator.

to take the reciprocal switch the numerator and the denominator.

use these to correct me if i messed up,, i couldn't see the numbers that clearly

Answer:

y^3/4x

Step-by-step explanation:

Answer:

3.75

Step-by-step explanation:

5

Simply add 3 and 2. You dont need to worry about the 50.

Or, complete 2x50 and 3x50

Now you would have 100 and 150.

Then add them to get 250.

Finally, divide 250 by 50.

Your answer should be 5

Answer:

[tex]0 \leq p < 6[/tex]

Step-by-step explanation:

Given

[tex]t = 6.95p + 29.95[/tex]

[tex]Amount = 70[/tex]

Required

Determine the domain

First, we need to solve for p

Substitute 70 for t in [tex]t = 6.95p + 29.95[/tex]

[tex]70 = 6.95p + 29.95[/tex]

Collect Like Terms

[tex]6.95p = 70 - 29.95[/tex]

[tex]6.95p = 40.05[/tex]

Solve for p

[tex]p = 40.05/6.95[/tex]

[tex]p = 5.76[/tex]

This implies that Larry can not invite up to 6 people.

Hence, the domain can be represented as: [tex]0 \leq p < 6[/tex]

Answer:

0.8

Step-by-step explanation:

Answer:

8/10

Step-by-step explanation:

5/5 is equivalent to 1 whole or one.

So all your suppose to do is 1 minus 2/10 which is 8/10.

Hope that helps

↖(^ω^)↗

Answer:

Step-by-step explanation:

3/4=15/20  are proportions

For every 3 you get a 4

So 5*3= 15 and 5*4=20

25/10 = 5//2 is another one.

Answer:

25/10 = 5/2

3/4 =15/20

Step-by-step explanation:

Answer:

The required inequality is: 12 ≤ 3x < 21

Step-by-step explanation:

We are given: three times a number is greater than or equal to 12 and less than 21

We need to answer following questions:

1) The inequality translated in numerical form

Let number = x

12 ≤ 3x < 21

2) Your work solving the inequality

We need to find value of x. Divide the inequality by x

4 ≤ x < 7

3) The solution graphed on a number line

It is shown in figure attached.

4) The solution in set notation

The set notation is: Considering x belongs to natural numbers N

{∀ x|x∈N, 4 ≤ x < 7}

5) The solution in interval notation

The interval notation is: [4,7)

because we have 4 less than equal to x and x is less than 7

Answer:

5. 3/4

7. -16

10. 32/243

11. a^3

12. b^4 and c^2

13. A mistake would occur if you multiplied 2/3 by five instead of squaring it by 5.

Step-by-step explanation:

Answer:more info pl

Z

Step-by-step explanation:

Answer:

x=25/3

Step-by-step explanation:

I'm not sure if it is correct but. . .

Answer: x=25/3

Step-by-step explanation:

Step-by-step explanation:

The answer for x in the solution is -5

Answer:645yards

Step-by-step explanation:  1 foot is 0.33333333 and math also the Convert units tab in google

Answer:

25%

Step-by-step explanation:

8/32= 25%

Answer:

y=mx +b

Step-by-step explanation: