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Question 7 (20 points) The U.S. Census Bureau conducts a study to...
The U.S. Census Bureau conducts a study to determine the time needed to complete the short...
The U.S. Census Bureau conducts a study to determine the time needed to complete the short form. The Bureau surveys 200 people. The sample mean is 8.2 minutes, and the sample standard deviation is 2.2 minutes. To calculate a confidence interval for this data, would you use a value from the Z distribution or the t distribution? Write a sentence to explain your choice. (4 points) Calculate the 99% confidence interval for µ, the population mean time it takes to...
Suppose that an accounting firm does a study to determine the time needed to complete one...
Suppose that an accounting firm does a study to determine the time needed to complete one person’s tax forms. It randomly surveys 100 people. The sample mean is 23.6 hours. There is a known standard deviation of 7.0 hours. The population distribution is assumed to be normal. a. i. x ¯ =________ ii. σ =________ iii. n =________ b. In words, define the random variables X and X ¯ . c. Which distribution should you use for this problem? Explain...
(3 points) The U.S. Bureau of the Census conducts nationwide surveys on characteristics of U.S. households....
(3 points) The U.S. Bureau of the Census conducts nationwide surveys on characteristics of U.S. households. Following are data on the number of people per household for a sample of 50 households Construct a grouped data table for these household sines size Frequency Total 50
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age...
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 700 employed persons and 300 unemployed persons are independently and randomly selected and that 500 of the employed persons and 200 of the unemployed persons have registered to vote. Can we conclude that the percentage of the employed workers (p1), who have registered to vote, exceeds the percentage of unemployed workers (p2), who have registered to...
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age...
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 637 employed persons and 586 unemployed persons are independently and randomly selected, and that 400 of the employed persons and 325 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers (Pi), who have registered to vote, exceeds the percentage of unemployed workers (P2), who have registered to vote?...
according to the u.s census bureau, the mean of 6 According to the U.S. Census s...
according to the u.s census bureau, the mean of
6 According to the U.S. Census s Bureau, the mean of the commute time to work for a resident of Boston. the Massachusetts, is 27.3 minutes. to answer the following: th sume that the standard deviation of the commute time is 8.1 minutes percentage of commuters in Boston has a commute time within 2 standard percentage of commuters in Boston has a commute time within 1.5 standard minimum percentage of commuters...
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age...
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 400 employed persons and 487 unemployed persons are independently and randomly selected, and that 221 of the employed persons and 211 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers ( p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2 ), who...
Every year, the U.S. Census Bureau conducts an income survey of about 60,000 American families that...
Every year, the U.S. Census Bureau conducts an income survey of about 60,000 American families that are carefully selected to represent the whole population. The data collected are used to measure income inequality. Which of the following is a reason that consus data may provide an inaccurate measure of income inequality? In kind transfers do not improve standards of living but are counted as income. Very few people move from one Income quintile to another over the years. Higher income...
Suppose that an accounting firm does a study to determine the time needed to complete one...
Suppose that an accounting firm does a study to determine the time needed to complete one person's tax forms. It randomly surveys 175 people. The sample mean is 23.8 hours. There is a known population standard deviation of 6.2 hours. The population distribution is assumed to be normal. Find the following: The sample mean x The population standard deviation σ The sample size n Let X be the time needed to complete one person's tax forms, and X the mean...
The Census Bureau groups data on households into census tracts, where each census tract has a total population of about 4,000 residents. Census tracts should be divided so that the households in the c...
The Census Bureau groups data on households into census tracts,
where each census tract has a total population of about 4,000
residents. Census tracts should be divided so that the households
in the census tracts share certain characteristics, such as
economic status. Even though most tracts are around 4,000
residents, there is some variability, which is the focus of this
lab. In practice, census tracts usually have a population between
1,200 and 8,000 people.
I just need help with the...
(3 points) The U.S. Bureau of the Census conducts nationwide surveys on characteristics of U.S. households. Following are data on the number of people per household for a sample of 50 households Construct a grouped data table for these household sines size Frequency Total 50
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 700 employed persons and 300 unemployed persons are independently and randomly selected and that 500 of the employed persons and 200 of the unemployed persons have registered to vote. Can we conclude that the percentage of the employed workers (p1), who have registered to vote, exceeds the percentage of unemployed workers (p2), who have registered to...
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 637 employed persons and 586 unemployed persons are independently and randomly selected, and that 400 of the employed persons and 325 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers (Pi), who have registered to vote, exceeds the percentage of unemployed workers (P2), who have registered to vote?...
according to the u.s census bureau, the mean of
6 According to the U.S. Census s Bureau, the mean of the commute time to work for a resident of Boston. the Massachusetts, is 27.3 minutes. to answer the following: th sume that the standard deviation of the commute time is 8.1 minutes percentage of commuters in Boston has a commute time within 2 standard percentage of commuters in Boston has a commute time within 1.5 standard minimum percentage of commuters...
Every year, the U.S. Census Bureau conducts an income survey of about 60,000 American families that are carefully selected to represent the whole population. The data collected are used to measure income inequality. Which of the following is a reason that consus data may provide an inaccurate measure of income inequality? In kind transfers do not improve standards of living but are counted as income. Very few people move from one Income quintile to another over the years. Higher income...
The Census Bureau groups data on households into census tracts,
where each census tract has a total population of about 4,000
residents. Census tracts should be divided so that the households
in the census tracts share certain characteristics, such as
economic status. Even though most tracts are around 4,000
residents, there is some variability, which is the focus of this
lab. In practice, census tracts usually have a population between
1,200 and 8,000 people.
I just need help with the...
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