All categories

3 years ago

What type of angle CB is a ? M B=

Mathematics

1 answer:

stellarik [79]3 years ago

6 0

Acute angle
chord
120÷2=60

You might be interested in

A simple random sample (SRS) of 150 is taken from a population with a 0.6 proportion of success. An independent SRS of 250 is ta

Virty [35]

Answer:

$SE_{\hat p_1 -\hat p_2}= \sqrt{\frac{0.6(1-0.6)}{150}+\frac{0.3(1-0.3)}{250}}= 0.0494$

Step-by-step explanation:

For this case we have the following data:

$n_1 =150$ represent the random sample 1 selected

$\hat p_1 =0.6$ represent the proportion of success for the sample 1 selected

$n_2 =250$ represent the random sample 2 selected

$\hat p_2 =0.3$ represent the proportion of success for the sample 2 selected

We know for this case that we can use the normal approximation since for both cases we have:

$n_1 p_1 =90 \geq 10, n_1 (1-p_1)=60 \geq 10$

$n_2 p_2 =75 \geq 10, n_2 (1-p_2)=175 \geq 10$

We have the randomization condition and we assume that the two samples are <10% of the entire population size.

So then we can use the following distribution for the proportions:

$p \sim N( \hat p, \sqrt{\frac{\hat p (1-\hat p)}{n}})$

For this case we want to find the distribution for the difference of these two proportions and we have this:

$p_1 -p_2 \sim N (\hat p_1 -\hat p_2 , \sqrt{\frac{\hat p_1 (1-\hat p_1)}{n_1} +\frac{\hat p_2 (1-\hat p_2)}{n_2}})$

So then the dtandard deviation would be given by:

$SE_{\hat p_1 -\hat p_2}= \sqrt{\frac{0.6(1-0.6)}{150}+\frac{0.3(1-0.3)}{250}}= 0.0494$

4 0

4 years ago

Read 2 more answers

The chart below contains the results of a survey of 25 students who were asked which musical instrument they play best. Instrume

liberstina [14]

Answer:

12%

Step-by-step explanation:

Add each number of students in the graph together. 1 + 6 + 2 + 3 = 12, so it's 12%.

6 0

3 years ago

Read 2 more answers

Help need rn i will give brainlest

irakobra [83]

the answer is the last one.

you convert to point slope form and get

y = 4x - 5

when you graph that (along with the other equations) it is the only one that passes through the point (1,-1)

4 0

3 years ago

Given lines l, m and n are all parallel and cut by two transversal lines, find the value<br> of x.

statuscvo [17]

Step-by-step explanation:

u should attach the picture of the question because its difficult to identify where x is located

kindly attach the picture

5 0

3 years ago

What is 1/4 - 2? (Possible answers: 1,5, or 20)

9966 [12]

1/4 - 2 would be -1.75

5 0

4 years ago

Read 2 more answers