About 22% of the residents of California were born outside the United States. You choose an...
About 22% of the residents of California were born outside the United States. You choose an SRS of 1000 California residents for a sample survey on immigration issues. You want to find the probability that 250 or more of the people in your sample were born outside the United States. (a) You would like to use the Normal approximation for the sampling distri- bution of a sample proportion to answer this question. Explain carefully why you can use the approximation in this setting. (b) What is the probability that 250 or more of the people in your sample were born outside the United States?
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About 22% of the residents of California were born outside the
United States. You choose an...
The proportion of baby boys born in the United States has historically been 0.513. You choose...
The proportion of baby boys born in the United States has historically been 0.513. You choose an SRS of 55 newborn babies and find that 48% are boys. Do ALL calculations to 5 decimal places before rounding. (d) In a random sample of 55 newborn babies, what is the probability that 48% or fewer of the sample are boys. (Use 3 decimal places). Hint: you are asked to find P(p^^\^ < .48 ). To calculate this first find the z-score...
ome he proportion of adult women in the United States is approximately 51%. A marketing survey...
ome he proportion of adult women in the United States is approximately 51%. A marketing survey telephones 300 people at random. (a) (3pts) What is the sampling distribution of the observed proportion that are women? State your answer with the mean and the standard deviation. 30 o (b) (3pts) would you be surprised to find 56% women in a sample of size 300? Explain. (c) (2 pts) What is the probability that more than S0% women in this survey? (d)...
Suppose the proportion of people affected by gluten sensitivity in the United States is 0.2. If...
Suppose the proportion of people affected by gluten sensitivity in the United States is 0.2. If we let (p^) be the proportion in a random sample of size n = 120, write the mean, standard deviation and sampling distribution of sample proportion, and find the approximate probability that the value of (p^) is less than the population proportion (p) by 0.01 or more within 0.01 of the p not within 0.01 of the p
Alexis de Tocqueville observed and wrote about the United States. If you were asked to observe...
Alexis de Tocqueville observed and wrote about the United States. If you were asked to observe and write about the United States from 1815-1849, what would you write about? What would be the most significant issues/events/people for your readers? Why? How would you describe the United States during this time? Why?
A sample of 680 adults in the United States were asked the following question from the...
A sample of 680 adults in the United States were asked the following question from the General Social Survey: “Do you sometimes drink more than you think you should?” The table below shows their responses. Sex Yes No Total Men 151 177 328 Women 92 260 352 Total 243 437 680 What is the percent probability that a randomly selected woman thinks she drank more than she should? 13.5% 26.1% 35.7% 37.9%
10. Working two jobs: About 12% of employed adults in the United States held multiple jobs....
10. Working two jobs: About 12% of employed adults in the United States held multiple jobs. A random sample of 65 employed adults is chosen. 1) Is it appropriate to use the normal approximation to find the probability that less than 5% of the individuals in the sample hold multiple jobs? If so, find the probability. If not, explain why not. II) A new sample of 200 employed adults is chosen. Find the probability that less than 5% of the...
Will rate, thank you very much Q7. A survey is being conducted in a city with...
Will rate, thank you very much
Q7. A survey is being conducted in a city with 1 million residents. It would be far too expensive to survey all of the residents, so a random sample of size 1000 is chosen. The survey is conducted by choosing people one at a time, with replacement and with equal probabilities. Find exact probability that at least one person will get chosen more than once. Then use an approximation to calculate this probability.
Up to 20% of people in the United States will catch the flu this year. Use...
Up to 20% of people in the United States will catch the flu this year. Use this figure as the population mean, and assume you work in an office space with 30 coworkers: b. What's the standard deviation? c. Using the appropriate approximation, determine Px > 1), that is, the probability that more than one of your coworkers will get the flu this year.
About 6% of employed adults in the United States held multiple jobs. A random sample of...
About 6% of employed adults in the United States held multiple jobs. A random sample of 69 employed adults is chosen. Use th TI-84 Plus calculator as needed. Part 1 of 5 (a) Is it appropriate to use the normal approximation to find the probability that less than 6.6% of the individuals in the sample hold multiple jobs? If so, find the probability. If not, explain why not. It is appropriate to use the normal curve, since np - 4.14...
There were 49.7 million people with some type of long-lasting condition or disability living in the...
There were 49.7 million people with some type of long-lasting condition or disability living in the United States in 2000. This represented 19.3 percent of the majority of civilians aged five and over (http://factfinder.census.gov). A sample of 1000 persons is selected at random. Use normal approximation. Round the answers to four decimal places (e.g. 98.7654). (a) Approximate the probability that more than 201 persons in the sample have a disability. (b) Approximate the probability that between 180 and 300 people...
ome he proportion of adult women in the United States is approximately 51%. A marketing survey telephones 300 people at random. (a) (3pts) What is the sampling distribution of the observed proportion that are women? State your answer with the mean and the standard deviation. 30 o (b) (3pts) would you be surprised to find 56% women in a sample of size 300? Explain. (c) (2 pts) What is the probability that more than S0% women in this survey? (d)...
10. Working two jobs: About 12% of employed adults in the United States held multiple jobs. A random sample of 65 employed adults is chosen. 1) Is it appropriate to use the normal approximation to find the probability that less than 5% of the individuals in the sample hold multiple jobs? If so, find the probability. If not, explain why not. II) A new sample of 200 employed adults is chosen. Find the probability that less than 5% of the...
Will rate, thank you very much
Q7. A survey is being conducted in a city with 1 million residents. It would be far too expensive to survey all of the residents, so a random sample of size 1000 is chosen. The survey is conducted by choosing people one at a time, with replacement and with equal probabilities. Find exact probability that at least one person will get chosen more than once. Then use an approximation to calculate this probability.
Up to 20% of people in the United States will catch the flu this year. Use this figure as the population mean, and assume you work in an office space with 30 coworkers: b. What's the standard deviation? c. Using the appropriate approximation, determine Px > 1), that is, the probability that more than one of your coworkers will get the flu this year.
About 6% of employed adults in the United States held multiple jobs. A random sample of 69 employed adults is chosen. Use th TI-84 Plus calculator as needed. Part 1 of 5 (a) Is it appropriate to use the normal approximation to find the probability that less than 6.6% of the individuals in the sample hold multiple jobs? If so, find the probability. If not, explain why not. It is appropriate to use the normal curve, since np - 4.14...
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