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sergij07 [2.7K]

3 years ago

8

sally decided she wanted homework help. no one gave it to her. if over 100 people were on the app to help and 1 person helped ho

w many people are helpless?

2 answers:

olga2289 [7]3 years ago

7 0

Answer:

thats so deep

<em>i</em><em> </em><em>see</em><em> </em><em>where</em><em> </em><em>you</em><em> </em><em>are</em><em> </em><em>coming</em><em> </em><em>from</em><em> </em><em>and</em><em> </em><em>i</em><em> </em><em>see</em><em> </em><em>ur</em><em> </em><em>point</em>

<em>ppljust</em><em> </em><em>need</em><em> </em><em>to</em><em> </em><em>stop</em><em> </em><em>being</em><em> </em><em>selfish</em><em> </em><em>an</em><em> </em><em>helo</em><em> </em><em>eachother</em><em> </em><em>wetre</em><em> </em><em>in</em><em> </em><em>a</em><em> </em><em>pandemic</em><em> </em><em>for</em><em> </em><em>christs</em><em> </em><em>sake</em>

Irina-Kira [14]3 years ago

4 0

All people but the 1

You might be interested in

On each of three consecutive days the National Weather Service announces that there is a 50-50 chance of rain. Assuming that the

kvasek [131]

Answer:

1. 50%

Step-by-step explanation:

For each day, there are only two possible outcomes. Either it does rain, or it does not, so we use the binomial probability distribution to solve this problem.

Binomial probability distribution

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

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinatios of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

In this problem we have that:

$n = 3, p = 0.5$

We want to find

NNN + RNN + NRN + NNR

This is

$P(X \leq 1) = P(X = 0) + P(X = 1)$

So

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{3,0}.(0.5)^{0}.(0.5)^{3} = 0.125$

$P(X = 1) = C_{3,1}.(0.5)^{1}.(0.5)^{2} = 0.375/tex][tex]P(X \leq 1) = P(X = 0) + P(X = 1) = 0.125 + 0.375 = 0.5$

The correct answer is:

1. 50%

3 0

3 years ago

What is the area of this figure?

Yakvenalex [24]

Answer:48units2

Step-by-step explanation:

3 0

3 years ago

A family drove 180 miles to disneyland. If they left at 10:30

luda_lava [24]

Average speed = Distance/ time

Distance = 180 mi

Time = time(final) - time(initial)

To find time will be easier if we translate am and pm into 24 h scale.

am will stay the same, so 10:30 am is 10:30. (initial)

pm will be turned (am time + 12), 3: 00 pm = 3:00 +12 =15:00 (final)

Time = time(final) - time(initial)= 15:00 - 10:30 = 14:60 - 10:30 =4h 30 min

4h + 30 min = 4h + 1/2 h= 4.5 h (time)

Average speed = Distance/ time = 180 mi / 4.5 h = 40 mi/h

Answer is 40 mi/h.

3 0

3 years ago

Liz has $25. She has 9 bills altogether. She only has $5 bills and $1 bills. How many of each does Liz have?

wlad13 [49]

Answer:

She has four $5 and five $1

Step-by-step explanation:

$5+$5+$5+$5 = $20 four $5

$1+$1+$1+$1+$1 = $5 five $1

This gives you a total of 9 bills.

4 0

4 years ago

Suppose that a local TV station conducts a survey of a random sample of 120 registered voters in order to predict the winner of

forsale [732]

Answer:

a) The 99% CI for the true proportion of voters who prefer the Republican candidate is (0.3658, 0.6001). This means that we are 99% sure that the true population proportion of all voters who prefer the Republican candidate is (0.3658, 0.6001).

b) The upper bound of the confidence interval is above 0.5 = 50%, which meas that the candidate can be confidence of victory.

Step-by-step explanation:

Question a:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

Sample of 120 registered voters in order to predict the winner of a local election. The Democrat candidate was favored by 62 of the respondents.

So 120 - 62 = 58 favored the Republican candidate, so:

$n = 120, \pi = \frac{58}{120} = 0.4833$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a p-value of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4833 - 2.575\sqrt{\frac{0.4833*0.5167}{120}} = 0.3658$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4833 + 2.575\sqrt{\frac{0.4833*0.5167}{120}} = 0.6001$

The 99% CI for the true proportion of voters who prefer the Republican candidate is (0.3658, 0.6001). This means that we are 99% sure that the true population proportion of all voters who prefer the Republican candidate is (0.3658, 0.6001).

b. If a candidate needs a simple majority of the votes to win the election, can the Republican candidate be confident of victory? Justify your response with an appropriate statistical argument.

The upper bound of the confidence interval is above 0.5 = 50%, which meas that the candidate can be confidence of victory.

8 0

3 years ago