Question

Suppose that the population proportion of Internet users who say that they use Twitter or another...

Suppose that the population proportion of Internet users who say that they use Twitter or another service to post updates about themselves or to see updates about others is 19%. about selecting random samples from a population in which 19% are Twitter users.


(a) Describe the sample space for selecting a single person.
(b) If you select three people, describe the sample space.
Think
(c) Using the results of part (b), define the sample space for the random variable that expresses the number of Twitter users in the sample of size 3.
(d) What information is contained in the sample space for part (b) that is not contained in the sample space for part (c)? Do you think this information is important? Explain your answer.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

please give me thumb up....

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Suppose that the population proportion of Internet users who say that they use Twitter or another...
Suppose that the population proportion of Internet users who say that they use Twitter or another service to post updates about themselves or to see updates about others is 19%. Think about selecting random samples from a population in which 19% are Twitter users. Using the notation T for a Twitter user Tc and for a non-Twitter user, if you select three people the sample space is {TTT, TTTc, TTcT, TcTT, TTcTc, TcTTc, TcTcT, TcTcTc}. Find the following probabilities: P(TTT)...
1a.)Based on data from a survey of 1,700 randomly selected Facebook users, a 95% confidence interval...
1a.)Based on data from a survey of 1,700 randomly selected Facebook users, a 95% confidence interval for the proportion of all Facebook users who say it is OK for someone to "friend" his or her boss is (0.42, 0.48). What is the meaning of the confidence level of 95% that is associated with this interval? Of all possible random samples, 5% would result in an interval that includes the actual value of the population proportion . Of all possible random...
According to a recent poll, 64% of adults who use the Internet have paid to download...
According to a recent poll, 64% of adults who use the Internet have paid to download music. In a random sample of size 1175, adults who use the Internet, let [^(p)] represent the sample proportion who have paid to download music. 1. Find the mean of the sampling distribution of [^(p)]. Answer to 2 decimal places. A: 0.17 B: 0.38 C: 0.46 D: 0.64 E: 0.70 F: 0.83 2. Find the standard deviation of the sampling distribution of [^(p)]. Answer...
Gallup recently conducted a survey about the proportion of Americans who use e-cigarettes (vape). The following...
Gallup recently conducted a survey about the proportion of Americans who use e-cigarettes (vape). The following example is based on hypothetical data that is meant to be similar to the data collected by Gallup. The following table considers survey data about annual household income and whether or not a person vapes. <$35,000 $35,000-$99,999 $100,000+ Total Vape 47 57 19 123 Do Not Vape 381 659 362 1402 Total 428 716 381 1525 Problem 1. Based on recent data, about 28%...
1. When constructing a confidence interval to estimate a population proportion, what affects the size of...
1. When constructing a confidence interval to estimate a population proportion, what affects the size of the margin of error? A. The sample size B. The sample proportion C. The confidence level D. All of the above affect the size of the margin of error E. None of the above affect the size of the margin of error 2. What percentage of couples meet through online dating apps? A survey of a random sample of couples finds that 12% say...
A.) Is the national crime rate really going down? Some sociologists say yes! They say that...
A.) Is the national crime rate really going down? Some sociologists say yes! They say that the reason for the decline in crime rates in the 1980s and 1990s is demographics. It seems that the population is aging, and older people commit fewer crimes. According to the FBI and the Justice Department, 70% of all arrests are of males aged 15 to 34 years. Suppose you are a sociologist in Rock Springs, Wyoming, and a random sample of police files...
#1. A survey organization recently conducted a random sample of 1000 individuals from the population of...
#1. A survey organization recently conducted a random sample of 1000 individuals from the population of American adults. The survey assessed the relationship between religiosity and partisanship. It asked the individuals whether religion is an important part of your life,” and asked them if they think of themselves as Democrats, Republicans, or Independents. The results were as follows: Partisanship Religion Not Important Religion Important Total Democrat 130 220 350 Independent 85 255 340 Republican 35 275 310 Total 250 750...
2) Airline accidents: According to the U.S. National Transportation Safety Board, the number of airline accidents...
2) Airline accidents: According to the U.S. National Transportation Safety Board, the number of airline accidents by year from 1983 to 2006 were 23, 16, 21, 24, 34, 30, 28, 24, 26, 18, 23, 23, 36, 37, 49, 50, 51, 56, 46, 41, 54, 30, 40, and 31. a. For the sample data, compute the mean and its standard error (from the standard deviation), and the median. b. Using R, compute bootstrap estimates of the mean, median and 25% trimmed...
1.The sample mean is an unbiased estimator for the population mean. This means: The sample mean...
1.The sample mean is an unbiased estimator for the population mean. This means: The sample mean always equals the population mean. The average sample mean, over all possible samples, equals the population mean. The sample mean will only vary a little from the population mean. The sample mean has a normal distribution. 2.Which of the following statements is CORRECTabout the sampling distribution of the sample mean: The standard error of the sample mean will decrease as the sample size increases....
1. A city official claims that the proportion of all commuters who are in favor of...
1. A city official claims that the proportion of all commuters who are in favor of an expanded public transportation system is 50%. A newspaper conducts a survey to determine whether this proportion is different from 50%. Out of 225 randomly chosen commuters, the survey finds that 90 of them reply yes when asked if they support an expanded public transportation system. Test the official’s claim at α = 0.05. 2. A survey of 225 randomly chosen commuters are asked...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT