Someone help me :( i don't understand this and I'm searching on the internet ill give 21 points please no trolling

Answer:

a. 0.007 = 0.7% probability that none of the households are turned to nbc Sunday night football

b. 0.993 = 99.3% probability that at least one of the households is turned to nbc Sunday night football.

c. 0.046 = 4.6% probability that at most one of the households is turned to nbc Sunday night football

d. 1 is less than 2.5 standard deviations below the mean, so having at most one people watching shouldn't be considered an unusual outcome, which means that the 22% share values does not appear wrong.

Step-by-step explanation:

For each household, there are only two possible outcomes. Either it is tuned to Sunday Night Football, or it is not. The probability of a household being tuned to Sunday Night Football is independent of any other household. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

And p is the probability of X happening.

22% are turned to that game

This means that [tex]p = 0.22[/tex]

Sample of 20 households:

This means that [tex]n = 20[/tex]

a. Find the probability that none of the households are turned to nbc Sunday night football:

This is P(X = 0). So

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]P(X = 0) = C_{20,0}.(0.22)^{0}.(0.78)^{20} = 0.007[/tex]

0.007 = 0.7% probability that none of the households are turned to nbc Sunday night football.

b. Find the probability that at least one of the households is turned to nbc Sunday night football.

This is:

[tex]P(X \geq 1) = 1 - P(X = 0)[/tex]

Since P(X = 0) = 0.007

[tex]P(X \geq 1) = 1 - P(X = 0) = 1 - 0.007 = 0.993[/tex]

0.993 = 99.3% probability that at least one of the households is turned to nbc Sunday night football.

c. Find the probability that at most one of the households is turned to nbc Sunday night football (3 digits)

This is

[tex]P(X \leq 1) = P(X = 0) + P(X = 1)[/tex]. So

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]P(X = 0) = C_{20,0}.(0.22)^{0}.(0.78)^{20} = 0.007[/tex]

[tex]P(X = 1) = C_{20,1}.(0.22)^{1}.(0.78)^{19} = 0.039[/tex]

[tex]P(X \leq 1) = P(X = 0) + P(X = 1) = 0.007 + 0.039 = 0.046[/tex]

0.046 = 4.6% probability that at most one of the households is turned to nbc Sunday night football.

d. If at most one household is turned to nbc Sunday night football, does it appear that the 22% share value is wrong? Why or why not?

A measure is considered unusually low if it is more than two and a half standard deviations below the mean.

The mean is:

[tex]E(X) = np = 20*0.22 = 4.4[/tex]

The standard deviation is:

[tex]\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{20*0.22*0.78} = 1.8526[/tex]

4.4 - 2.5*1.8526 = -0.2.

1 is less than 2.5 standard deviations below the mean, so having at most one people watching shouldn't be considered an unusual outcome, which means that the 22% share values does not appear wrong.

Answer:

x=6

Step-by-step explanation:

get your cup alone by removing the 3 balls. When I take one ball away from one side I have to take it form the other as well. so subtract 3 balls from both sides

x=6

Step-by-step explanation:

2 is the answer because it's in the middle

Answer: 19.101 miles north

Step-by-step explanation:

Now were given an right angled trinagle with the with the 2nd angle being 23 degrees and given a triangle leg length of 45 miles which is adjcent to the angle and were trying to find how find out how far north it went meaning were trying to find how far up it went thus trying to find the side opposite of the angle.

So now we know our facts we need a trig function which uses both the adjacent and opposites sides, that would be tangent.

Answer:

Her account balance after 5 years is $8702.87

Step-by-step explanation:

1500 (1.05) = 1575 --> after one year

1575 + 1500 = 3075    

3075 (1.05) = 3228.75 --> after two years

3228.75 + 1500 = 4728.75

4728.75 (1.05) = 4965.1875 --> after three years

4965.1875 + 1500 = 6465.1875

6465.1875 (1.05) = 6788.44688 --> after four years

6788.44688 + 1500 = 8288.44688

8288.44688 (1.05) = 8702.86922 --> after five years = $8702.87

Answer:

Since the pvalue of the test is 0 < 0.01, we reject the null hypothesis and accept the alternate hypothesis that the true mean score for all sober subjects is different of 35.

Step-by-step explanation:

Test the claim that the true mean score for all sober subjects is equal to 35.0.

This means that the null hypothesis is:

[tex]H_{0}: \mu = 35[/tex]

And the alternate hypothesis is:

[tex]H_{a}: \mu \neq 35[/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.

35 is tested at the null hypothesis:

This means that [tex]\mu = 35[/tex]

Sample of 20, mean score of 41.0 with a standard deviation of 3.7.

This means that [tex]n = 20, X = 41, \sigma = 3.7[/tex]

Value of test statistic:

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

[tex]z = \frac{41 - 35}{\frac{3.7}{\sqrt{20}}}[/tex]

[tex]z = 7.25[/tex]

Pvalue of the test:

The pvalue of the test is the probability that differs from the mean by at least 41 - 35 = 6, which is the probability that |z| < 7.25.

z = -7.25 has a pvalue of 0

2*0 = 0

Since the pvalue of the test is 0 < 0.01, we reject the null hypothesis and accept the alternate hypothesis that the true mean score for all sober subjects is different of 35.

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

Correct choice is B

Step-by-step explanation:

[tex] \sf \: \dfrac{3}{4} + \dfrac{1}{2} \\ \sf ➡ \frac{3 + 2}{4} \\ \sf➡ \frac{5}{4} \\ \sf➡1 \frac{1}{4} [/tex]

Answer:

O B. f(x) = 2^x

i think its true but iam not sure

hope it helps

Answer:

w < 3

Step-by-step explanation:

One can solve an algebraic inequality just like how one solves an algebraic equation, by using inverse operations. The only major difference is that when one multiplies or divides by a negative number, one must remember to flip the inequality sign, this rule does not come into play in the given inequality.

4x - 2 < 10

   +2      +2

4x < 12

/4    /4

w < 3

Answer:

true

Step-by-step explanation:

3 is half of 6

1 is half of 2

Answer:

True

Step-by-step explanation:

Answer:

Add all 25-29 ages together to get your answer

Step-by-step explanation:

Answer:

the answer is 3

Step-by-step explanation:

Answer:

Step-by-step explanation:

hello :

cos²θ +sin²θ = 1 and cosθ =4/5

(4/5)² + sin²θ = 1 so : sin²θ = 1 - 16/25

sin²θ = 9/25 = (3/5)²

sinθ = 3/5 or sinθ = - 3/5 because : (3/5)²= (- 3/5)²= 9/25

Answer:

6

Step-by-step explanation:

I think

Answer:

It shouldn't be a problem.

Calculate the area as usual.

But if the fraction is troubling you then, change the fraction (by further solving/dividing it) into decimal.

Answer:

240/12=20

Step-by-step explanation:

Answer:

I think the answer is B

Step-by-step explanation:

There are 240 crayons.

The crayons came in packs of 12.

So, in order to find out how many packs she bought we have to divide 240 by 12.

240/12 = 20 packs

Answer:

C (3 inches by 6 inches)

Step-by-step explanation:

Answer:

b= -49

Step-by-step explanation:

Well first isolate the number with the variable by performing inverse operations

1/7b= -7

now multiply by 7 on each side to isolate the variable.

b= -49

B is negative 49

Answer: m=25

Step-by-step explanation: 49 - 24= 25

Answer:

$30.25

they each put together $30.25

Step-by-step explanation:

121.00 divided by 4 =

30.25

Answer:

5x^2 + 7x

option C is your answer

Answer:

2031

Step-by-step explanation:

3.63=0.046x+2.664

0.966=0.046x

21=x

2010+21=2031

Answer: c

Step-by-step explanation: Slove for the first variable in on of the equations, then substitute the result into the other equation. giving you (-1/3, 2) or x=-1/3 and y= 2

Answer:

D is Permutation with repetition right

Step-by-step explanation:

Answer:

Step-by-step explanation:

there are 6-10

Answer:

1 D. 400 spins

2 C.4/20

3 A. 6/20

Step-by-step explanation:

1

The more times you run a probability-based trial, the more likely you are to get close to the theoretical frequency.

2

Since 1 and 2 represent goals, just find the options that have three/four 2's and 1's. These are 5212, 2152, 2512, and 2112. Since there are 4 options out of 20, we can say our probability is 4/20

C

Since 1 and 2 represent goals, we have to find the options where there are no 1's or 2's. These are 6643, 3554, 4533, 6634, 4536, and 5546. Since there are 6 options out of 20, we can say our probability is 6/20

Answer:

6

Step-by-step explanation:

the equation would be 2/(x-3) + 2/x = 1 derived from the work formula of T/A + T/B = 1; T representing total time working together, A/B respectively representing the two different rates of working. In the end Terry would spend 6 hours working alone.

Answer:

[tex]a)\ \ 4[/tex]

Step-by-step explanation:

A secant is a line that intersects a circle in two points. The product of the lengths theorem is a theorem that forms a ratio between the lengths of the secants when two secants intersect in a circle. Let ([tex]secant_1[/tex]) and ([tex]secant_2[/tex]) refer to the entirety of the secants. ([tex]part_1_a[/tex]) and ([tex]part_1_b[/tex]) will refer to the different parts of ([tex]secant_1[/tex]). ([tex]part_2_a[/tex]) and ([tex]part_2_b[/tex]) will refer to the different parts of ([tex]secant_2[/tex]).

[tex]part_1_a*part_1_b=part_2_a*part_2_b[/tex]

Substitute with the given values in the problem,[tex]part_1_a*part_1_b=part_2_a*part_2_b[/tex]

[tex]x*9=3*12[/tex]

Simplify,

[tex]x*9=3*12[/tex]

[tex]9x=36[/tex]

Inverse operations,

[tex]9x=36[/tex]

[tex]x=4[/tex]

Answer:

5,7%

Step-by-step explanation:

190270 is 100%

1% is 1902,7

10770/1902,7 = 5,66