Help !!!!!!!!!!!!!!!!!!!!!

Answer:

The null hypothesis is [tex]H_0: p = 0.2[/tex]

The alternate hypothesis is [tex]H_a: p < 0.2[/tex]

The p-value of the test is 0.1056 > 0.05, which means that there is not evidence of decline in participation after age 40 using α = 0.05.

Step-by-step explanation:

20% of American adults participate in fitness activities at least twice a week. Test if there is evidence of a decline in participation after age 40.

At the null hypothesis, we test that the proportion is of 0.2, so:

[tex]H_0: p = 0.2[/tex]

At the alternate hypothesis, we test if the proportion is less than 0.2, indicating a decline. So

[tex]H_a: p < 0.2[/tex]

The test statistic is:

[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.

20% is tested at the null hypothesis:

This means that [tex]\mu = 0.2, \sigma = \sqrt{0.2*0.8}[/tex]

A random sample of 100 adults over 40 years old found 15 who exercised at least twice a week.

This means that [tex]n = 100, X = \frac{15}{100} = 0.15[/tex]

Test statistic:

[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]

[tex]z = \frac{0.15 - 0.2}{\frac{\sqrt{0.2*0.8}}{\sqrt{100}}}[/tex]

[tex]z = -1.25[/tex]

P-value of the test:

The p-value of the test is the probability of finding a sample proportion below 0.15, which is the p-value of z = -1.25.

Looking at the z-table, z = -1.25 has a pvalue of 0.1056.

The p-value of the test is 0.1056 > 0.05, which means that there is not evidence of decline in participation after age 40 using α = 0.05.

Answer:

x = 48º

Step-by-step explanation:

x = 90 -42

x = 48º

Answer:

REVENGE

Step-by-step explanation:

Answer:

Answer is im not sure

Answer:

x<4

Step-by-step explanation:

3x < 12

Divide with 3 on each side

x< 4

In words x has all the real numbers that are less than 4 or x belongs to any number from -ve infinity to 4.

The graph of the inequality 3x < 12 on a number line would consist of an open circle at 4, followed by a shaded region to the left of 4 and extending indefinitely in that direction.

It shows a relationship between two numbers or two expressions.

There are commonly used four inequalities:

Less than = <

Greater than = >

Less than and equal =

Greater than and equal=

We have,

To graph the inequality 3x < 12 on a number line, we can follow these steps:

- Start by isolating x by dividing both sides of the inequality by 3, which gives us x < 4.

- Draw a number line and mark a point at 4, which is the boundary between the values of x that satisfy the inequality and those that don't.

- Since the inequality is strict (i.e., "less than" and not "less than or equal to"), we need to indicate that the point x = 4 is not included in the solution set.

We can do this by making an open circle (or "unfilled dot") at 4 on the number line.

- Shade the portion of the number line to the left of the point x = 4, since these are the values of x that satisfy the inequality 3x < 12.

We can use an arrow pointing to the left to indicate that the shaded region extends indefinitely in that direction.

Thus,

The graph of the inequality 3x < 12 on a number line would consist of an open circle at 4, followed by a shaded region to the left of 4 and extending indefinitely in that direction.

Learn more about inequalities here:

https://brainly.com/question/20383699

#SPJ3

Answer:

$336

Step-by-step explanation:

1 - 20% = .8

1 * 12% = 1.12

375 * .8 * 1.12 = 336

The total cost was of $336.

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

This question is solved using percentages/proportions.

Thus, the total cost will be given by:

[tex]C = 375 \times 0.8 \times 1.12 = 336[/tex]

The total cost was of $336.

A similar question is given at https://brainly.com/question/8719621

Answer:

I don't know how about you be more specific...

Like what country of what continent of what planet of what galaxy of what galaxy cluster of what universe of what dimension of what multiverse of what time?

Answer:

circle

radius

infinite

Step-by-step explanation:

have a wonderful day <3

If z is the complex number then IzI = 5 represents the equation of the circle.

A circle is a closed, two-dimensional object where every point in the plane is equally spaced from a central point. The line of reflection symmetry is formed by all lines that traverse the circle.

And the general formula of the circle,

(x – h)²+ (y - k)² = r²,

where (h, k) is the center and r is the radius of the circle.

Given:

The equation of the circle.

IzI = 5.

The set of all complex numbers with a given modulus (such as 5) always has the shape of a circle.

And the modulus represents the radius of the circle.

Therefore, the modulus represents the radius of the circle.

To learn more about the circle;

https://brainly.com/question/29142813

#SPJ2

Answer:

Step-by-step explanation:

9

Answer: 8

Step-by-step explanation:

First, all the times are 5, 5, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 9, 10. Second, you put them in ordet, but that’s already done. Then the median is the middle. The number in the middle is 8.

The answers are correct, however in the first box it should be 22y instead of just 22. Same with the 6 it should be 6x.

Answer:

60

Step-by-step explanation:

100 - 40 =  60

Common Math

Answer: You can't unfortunatly. 44 divided by 44 is 1 though

Step-by-step explanation:

Answer:

The number of data values between the lower quartile and the median is less than the number of data values between the upper quartile and the median.

Step-by-step explanation:

Answer:

Length = 40

Height = 20

Step-by-step explanation:

If you multiply 40 x 20, it equals 800

20 is also half of 40 as well.

Answer:

D. -10

Step-by-step explanation:

The sum of a triangle = 180°, therefore,

64° + 63° + x + 63 = 180°

Add like terms

x + 190° = 180°

Subtract 190 from each side

x + 190 - 190 = 180 - 190

x = -10

Step-by-step explanation:

8(m + 2)= 16

8m + 16 = 16

8m = 0

m = 0

Answer:

10+2b

Step-by-step explanation:

do 2(b+3)

2xb + 2x3

2b+6

4+(2b+6)

10+2b

hope that helped

Where is the problem

Answer:

Alternative hypothesis is that Worker productivity is higher with automatic dispensers.

The Rank for  Group1  is 115.5 and Group 2 is 55.5.

Conclusion is that Worker productivity is higher with automatic dispensers.

Step-by-step explanation:

The null and alternative hypotheses are

H0: Group1 ≤ Group2   against the claim

Ha: Group1 > Group2

Alternative hypothesis is that Worker productivity is higher with automatic dispensers.

Calculations:

                                        Group1               Group2

Sample Mean   x `       139.22               114.67

Sample size n                   9                         9

Sample SD                     18.21                  11.937

Rank                               115.5                       55.5

U                                      10.5                          70.5

The Rank for  Group1  is 115.5 and Group 2 is 55.5.

1. H0 hypothesis

As p-value < alpha  and Z lies in the critical region, H0 is rejected.

The randomly selected value of Group1's population is considered have greater productivity  than the randomly selected value of Group2's population.

2. P-value

The p-value equals 0.0046.

3. Test statistics

Z= u-μ+c/σ

The critical region for one tailed test for z at 0.01 significance level is

z > 2.33.

The test statistic Z equals 2.6063, which lies in the critical region of acceptance z> 2.326

4. Conclusion

As the calculated test statistic lies in the critical region H0 is rejected and it is concluded that

Worker productivity is higher with automatic dispensers.

Answer:

Should be 1250$

Answer:

1250

Step-by-step explanation:

First we divide 500 divide by 80 that will give you 6.25

So then you multiply 6.25 by 80 to get sure then if you are sure, yo will multiply 6.25 by 200 that will give you, 1,250.

Answer:

7x + 7

Step-by-step explanation:

Answer:

false, parallel lines will never meet.

Step-by-step explanation:

Answer:

x = 20

Step-by-step explanation:

x/10 = 2 multiply both sides of the equation by ten ↓

10x x/10 = 10 x 2 reduce the numbers with the greatest common factor 10 ↓

x = 10 x 2 multiply the numbers ↓

x = 20

Answer:

A)3.125hr

B)53.325mi

Step-by-step explanation:

speed=distance/time

an hour and 15min=1.25hr

32/1.25=25.6mi/hr

80/25.6=3.125hr

B)

2hr and 5min=2+5/60=2.083hr

2.083x25.6=53.325mile

Answer:

Give me a sec and ill answer in this comments k

Step-by-step explanation:

Answer:

y =3x+2

Step-by-step explanation:

Answer:

6/8

Step-by-step explanation:

we need to calculate 3/8 + 3/8 = 6/8

Answer:

3/4

Step-by-step explanation:

1 hour is 2 times 1/2 hour.

2 * 3/8 = 6/8 = 3/4

Answer:

48[tex]m^{2}[/tex]

Step-by-step explanation:

Area = base x height

Area = 8m x 6m

Area = [tex]48m^{2}[/tex]

Answer:

B

Step-by-step explanation:

because it ends up being -0.09090909...

Step-by-step explanation:

becous is end o.0909090

Answer:

0.3. pls give me brainliest