3 years ago

Choose the answer that best represents the situation described below.

Mathematics

1 answer:

seropon [69]3 years ago

4 0

The answer is c also ur very much welcome

You might be interested in

Eric is studying people's typing habits. He surveyed 525 people and asked whether they leave one space or two spaces after a per

Otrada [13]

Answer: (0.8115, 0.8645)

Step-by-step explanation:

Let p be the proportion of people who leave one space after a period.

Given: Sample size : n= 525

Number of people responded that they leave one space. =440

i.e. sample proportion: $\hat{p}=\dfrac{440}{525}\approx0.838$

z-score for 90% confidence level : 1.645

Formula to find the confidence interval :

$\hat{p}\pm z^*\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$0.838\pm (1.645)\sqrt{\dfrac{0.838(1-0.838)}{525}}\\\\=0.838\pm (1.645)\sqrt{0.00025858285}\\\\=0.838\pm (1.645)(0.01608)\\\\= 0.838\pm0.0265\\\\=(0.838-0.0265,\ 0.838+0.0265)\\\\=(0.8115,\ 0.8645)$

Hence, a 90% confidence interval for the proportion of people who leave one space after a period: (0.8115, 0.8645)

3 0

3 years ago

Abraham told his friends to try and guess his number. He said that when you take his number and multiply it by 4 and add 12 you

lisov135 [29]

Answer:

C) 22

Step-by-step explanation:

I have set up an equation based off of what Abraham said.

$(n*4)+12=100\\\\4n+12=100\\\\4n+12-12=100-12\\\\4n=88\\\\\frac{4n=88}{4}\\\\\boxed{n=22}$

The number should be 22.

Hope this helps.

8 0

3 years ago

Read 2 more answers

What is 220 degrees celsius in fahrenheit?

zloy xaker [14]

428

That is the answer

4 0

3 years ago

A line passes through the point (-4,-1) and has a slope of -3/2

Reptile [31]

Is there more to the question?

6 0

3 years ago

You have four cards, labeled 2-5. What is the probability of drawing a number less than 3, putting the card back, then drawing a

Usimov [2.4K]

$|\Omega|=4^2=16\\ |A|=1\cdot 3=3\\\\ P(A)=\dfrac{3}{16}\approx19\%$

3 0

3 years ago