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3 years ago

I need help on this ixl question

Mathematics

1 answer:

Alexeev081 [22]3 years ago

7 0

Answer:

$apple \: and \: gauva \: r \: u \: understand \: \\ ok \: byy \: have \: a \: goodday$

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A computer manufacturing company has sent a mail survey to 2,800 of its randomly selected customers that have purchased a new la

vodka [1.7K]

Answer:

The 96% confidence interval for the population proportion of customers satisfied with their new computer is (0.77, 0.83).

Step-by-step explanation:

We have to calculate a 96% confidence interval for the proportion.

We consider the sample size to be the customers that responded the survey (n=800), as we can not assume the answer for the ones that did not answer.

The sample proportion is p=0.8.

$p=X/n=640/800=0.8$

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.8*0.2}{800}}\\\\\\ \sigma_p=\sqrt{0.0002}=0.014$

The critical z-value for a 96% confidence interval is z=2.054.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_p=2.054 \cdot 0.014=0.03$

Then, the lower and upper bounds of the confidence interval are:

$LL=p-z \cdot \sigma_p = 0.8-0.03=0.77\\\\UL=p+z \cdot \sigma_p = 0.8+0.03=0.83$

The 96% confidence interval for the population proportion is (0.77, 0.83).

4 0

3 years ago

What is 0.000000025 written in exponent form plz hurry

Evgesh-ka [11]

Answer:2.5×10^-5. (And i think u meant in Scientific Notation)

Step-by-step explanation//Give thanks(and or Brainliest) if helpful (≧▽≦)//

4 0

3 years ago

Can someone hep with this question please it seems like i can't get the answer correctly.ty!!

Mashcka [7]

Answer:

your answer will be 5

Step-by-step explanation:

hope it helps have a nice day/night ^_^

bye

4 0

3 years ago

AHHHHHHHHHHHHHHH SOMEONE ANSWEER THIS PLEEASEEE NEED ANSWER ASP 20 pts!! Please answer!!! I literally don't get this ;c so PLEAS

Blababa [14]

Answer:

$P(A\textrm{ and }B)=\frac{3}{14}$

Step-by-step explanation:

Given:

$P(A)=\frac{4}{7}$

$P(B|A)=\frac{3}{8}$

We know that, conditional probability of B given that A has occurred is given as:

$P(B|A)=\frac{P(A\cap B}{P(A)}$ . Expressing this in terms of $P(A\cap B)$ , we get

$P(A\cap B)=P(B|A)\times P(A)$

Plug in the known values and solve for $P(A\cap B)$ . This gives,

$P(A\cap B)=P(B|A)\times P(A)\\P(A\cap B)=\frac{3}{8}\times \frac{4}{7}\\P(A\cap B)=\frac{12}{56}=\frac{3}{14}$

Therefore, the probability of events A and B occurring is $\frac{3}{14}$ .

6 0

3 years ago

Read 2 more answers

In a community of 1000 people, what is the (annual) probability of 8 births? What is the probability of 8 deaths? What is the pr

GaryK [48]

I don’t know sorryyyy Answer:

Step-by-step explanation:

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4 years ago