Question

In: Statistics and Probability

In a sample of 1100  U.S.​ adults, 203 think that most celebrities are good role models. Two...

In a sample of 1100  U.S.​ adults, 203 think that most celebrities are good role models. Two Two U.S. adults are selected at random from the population of all U.S. adults without replacement. Assuming the sample is representative of all U.S.​ adults, complete parts​ (a) through​ (c).

(a) Find the probability that both adults think most celebrities are good role models. The probability that both adults think most celebrities are good role models is ________?(Round to three decimal places as​ needed.)

​(b) Find the probability that neither adult thinks most celebrities are good role models. The probability that neither adult thinks most celebrities are good role models is _______?(Round to three decimal places as​ needed.) ​

(c) Find the probability that at least one of the two adults thinks most celebrities are good role models. The probability that at least one of the two adults thinks most celebrities are good role models ______? (Round to three decimal places as​ needed.)

Solutions

Expert Solution

Given,

In a sample of 1100 U.S.​ adults, 203 adult people think that most celebrities are good role models

Therefore,

Probability that a U.S. adult person think that most celebrities are good role models, p = 203/1100

Probability that a U.S. adult person does not think that most celebrities are good role models = 1 - p = 1 – (203/1100) = 897/1100

Two U.S. adults are selected at random from the population of all U.S. adults Without Replacement

Answer a:
Probability that both adults think that celebrities are good role models = p^2 = (203/1100)^2

                                                                                                                = 0.034

Answer b:
Probability that neither adult thinks that celebrities are good role models = (1 – p)^2 = (897/1100)^2 = 0.665

Answer c:
Probability that at least one of the two adults thinks most celebrities are good role models = 1 - Probability that neither adult thinks that celebrities are good role models = 1 – 0.665 = 0.335

(All answers are rounded up to 3 decimal places)


Related Solutions

​In a sample of 800 U.S.​ adults, 199 think that most celebrities are good role models....
​In a sample of 800 U.S.​ adults, 199 think that most celebrities are good role models. Two Two U.S. adults are selected at random from the population of all U.S. adults without replacement. Assuming the sample is representative of all U.S.​ adults, complete parts​ (a) through​ (c). (a) Find the probability that both adults think most celebrities are good role models. The probability that both adults think most celebrities are good role models is ________?(Round to three decimal places as​...
In a random sample of 1008 U.S. adults taken 10 years ago, 515 think that the...
In a random sample of 1008 U.S. adults taken 10 years ago, 515 think that the U.S. government is doing too little to protect the environment. In a recent random sample of 1022 U.S. adults, 480 think that the U.S. government is doing too little to protect the environment. At ? = 0.05, test the claim that the proportion of U.S. adults who think that the U.S. government is doing too little to protect the environment has changed? Create a...
Confidence Intervals In a random sample of 1100 American adults it was found that 320 had...
Confidence Intervals In a random sample of 1100 American adults it was found that 320 had hypertension (high-blood pressure). The US Department of Health and Human Services (HHS) wants the population proportion of hypertension to 16% by 2022. Find the 95% confidence interval for the proportion of all adult Americans that have hypertension. Interpret the confidence interval in the words of the problem. Find the error bound. Does this data and analysis provide evidence that the population proportion of hypertension...
_____ A random sample of 1003 U.S. adults was asked “Do you pretty much think televisions...
_____ A random sample of 1003 U.S. adults was asked “Do you pretty much think televisions are a necessity of a luxury you could do without?” OF the 1003 adults surveyed, 521 indicated that televisions are a luxury they could do without. a) What are the observational units? b) What is the variable? Is it binary/dichotomous? c) Verify that the conditions of the confidence interval are met – that we have a representative sample, and that and . d) Produce...
1. In a random sample of 1008 U.S. adults taken 10 years ago, 515 think that...
1. In a random sample of 1008 U.S. adults taken 10 years ago, 515 think that the U.S. government is doing too little to protect the environment. In a recent random sample of 1022 U.S. adults, 480 think that the U.S. government is doing too little to protect the environment. At ? = 0.05, test the claim that the proportion of U.S. adults who think that the U.S. government is doing too little to protect the environment has changed? Show...
In a random sample of 440 U.S. adults, 76% said that they believe that the U.S....
In a random sample of 440 U.S. adults, 76% said that they believe that the U.S. Congress fails to pass laws that benefit the lives of all Americans. Use these sample statistics to construct a 90% confidence interval for the proportion of all U.S. adults who believe that the U.S. Congress fails to pass laws that benefit the lives of all Americans. Give your answers as decimals, rounded to three decimal places. < p <
A research center claims that more than 55% of U.S. adults think that it is essential...
A research center claims that more than 55% of U.S. adults think that it is essential that the United States continue to be a world leader in space exploration. In a random sample of 25 U.S. adults, 64% think that it is essential that the United States continue to be a world leader in space exploration. At a = 0.01, is there enough evidence to support the center’s claim? (Adapted from Pew Research Center)
In a survey of 1000 U.S. adults, 700 think police officers should be required to wear...
In a survey of 1000 U.S. adults, 700 think police officers should be required to wear body cameras while on duty. a. Construct a 90% confidence interval for the proportion of all U.S. adults that think police officers should be required to wear body cameras while on duty. b. Interpret your confidence interval.
Pinworm: In a prior sample of U.S. adults, the Center for Disease Control (CDC), found that...
Pinworm: In a prior sample of U.S. adults, the Center for Disease Control (CDC), found that 10% of the people in this sample had pinworm but the margin of error for the population estimate was too large. They want an estimate that is in error by no more than 2.5 percentage points at the 90% confidence level. Enter your answers as whole numbers. (a) What is the minimum sample size required to obtain this type of accuracy? Use the prior...
In a survey of U.S. adults with a sample size of 2040​, 315 said Franklin Roosevelt...
In a survey of U.S. adults with a sample size of 2040​, 315 said Franklin Roosevelt was the best president since World War II. Two U.S. adults are selected at random from the population of all U.S. adults without replacement. Assuming the sample is representative of all U.S.​ adults, complete parts​ (a) through​ (d). (a) Find the probability that both adults say Franklin Roosevelt was the best president since World War II. The probability that both adults say Franklin Roosevelt...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT