A group conducted a survey of 13,000 brides and grooms married in the United States and...
A group conducted a survey of 13,000 brides and grooms married in the United States and found that the average cost of a wedding is $26,858. Assume that the cost of a wedding is normally distributed with a mean of $26,858 and a standard deviation of $5,900.
(a) What is the probability that a wedding costs less than $18,000? (Round your answer to four decimal places.)
(b) What is the probability that a wedding costs between $18,000 and $30,000? (Round your answer to four decimal places.)
(c) What is the minimum cost (in dollars) for a wedding to be included among the most expensive 5% of weddings? (Round your answer to the nearest dollar.)
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A group conducted a survey of 13,000 brides and grooms married
in the United States and...
A group conducted a survey of 13,000 brides and grooms married in the United States and...
A group conducted a survey of 13,000 brides and grooms married in the United States and found that the average cost of a wedding is $26,858. Assume that the cost of a wedding is normally distributed with a mean of $26,858 and a standard deviation of $5,900. (a) What is the probability that a wedding costs less than $18,000? (Round your answer to four decimal places.) (b) What is the probability that a wedding costs between $18,000 and $30,000? (Round...
4) John believes that 50% of first-time brides in the United States are younger than their...
4) John believes that 50% of first-time brides in the United States are younger than their grooms. He performs a hypothesis test to test the claim that if the percentage is different from 50%. John samples 100 first-time brides and 53 reply that they are younger than their grooms. a0.01 (10 points) (a) What are the hypotheses? nc (b) Find the test statistic. (Show all your formula and work) (Round to two decimal places as needed.) (c) Find the p-value...
The cost of weddings in the United States has skyrocketed in recent years. As a result,...
The cost of weddings in the United States has skyrocketed in recent years. As a result, many couples are opting to have their weddings in the Caribbean. A Caribbean vacation resort recently advertised in Bride Magazine that the cost of a Caribbean wedding was less than $10,000. Listed below is a total cost in $000 for a sample of 8 Caribbean weddings. At the .005 significance level is it reasonable to conclude the mean wedding cost is less than $10,000...
The National Occupant Protection Use Survey (NOPUS) was conducted to provide probability-based data on motorcycle helmet...
The National Occupant Protection Use Survey (NOPUS) was
conducted to provide probability-based data on motorcycle helmet
use in the United States. The survey was conducted by sending
observers to randomly selected roadway sites where they collected
data on motorcycle helmet use, including the number of
motorcyclists wearing a Department of Transportation
(DOT)-compliant helmet (National Highway Traffic Safety
Administration website, January 7, 2010). Sample data consistent
with the most recent NOPUS are shown below.
a. Use the data to compute the...
The cost of weddings in the United States has skyrocketed in recent years. As a result,...
The cost of weddings in the United States has skyrocketed in recent years. As a result, many couples are opting to have their weddings in the Caribbean. A Caribbean vacation resort recently advertised in Bride Magazine that the cost of a Caribbean wedding was less than $10,000. Listed below is a total cost in $000 for a sample of 8 Caribbean weddings. At the 0.025 significance level is it reasonable to conclude the mean wedding cost is less than $10,000...
An article reported that 5% of married couples in the United States are mixed racially or...
An article reported that 5% of married couples in the United States are mixed racially or ethnically. Consider the population consisting of all married couples in the United States. (a) A random sample of n = 150 couples will be selected from this population and p̂, the proportion of couples that are mixed racially or ethnically, will be computed. What are the mean and standard deviation of the sampling distribution of p̂? (Round your standard deviation to four decimal places.)...
According to the National Health Survey, the heights of adult males in the United States are...
According to the National Health Survey, the heights of adult males in the United States are normally distributed with mean 69.0 inches and standard deviation 2.8 inches. (a) What is the probability that an adult male chosen at random is between 64 and 74 inches tall? (Round your answer to three decimal places.) (b) What percentage of the adult male population is more than 6 feet tall? (Round your answer to one decimal place.) ________ %
According to the National Health Survey, the heights of adult males in the United States are...
According to the National Health Survey, the heights of adult males in the United States are normally distributed with mean 69.0 inches and standard deviation 2.8 inches. (a) What is the probability that an adult male chosen at random is between 64 and 74 inches tall? (Round your answer to three decimal places.) (b) What percentage of the adult male population is more than 6 feet tall? (Round your answer to one decimal place.) %
In a survey in a certain year of married couples with earnings, 93% of all husbands...
In a survey in a certain year of married couples with earnings, 93% of all husbands were employed. Of all employed husbands, 73% of their wives were also employed. Noting that either the husband or wife in a couple with earnings had to be employed, find the probability that the husband of an employed woman was also employed. (Round your answer to four decimal places.)
A survey of enrollment at 35 community colleges across the United States yielded the following figures†....
A survey of enrollment at 35 community colleges across the United States yielded the following figures†. 6414; 1550; 2109; 9350; 21828; 4300; 5944; 5722; 2825; 2044; 5481; 5200; 5853; 2750; 10012; 6357; 27000; 9414; 7681; 3200; 17500; 9200; 7380; 18314; 6557; 13713; 17768; 7493; 2771; 2861; 1263; 7285; 28165; 5080; 11622 Part (a) Organize the data into a chart with five intervals of equal width. Enrollment Frequency 0 - 6,000 6,001 - 12,000 12,001 - 18,000 18,001 - 24,000 24,001...
4) John believes that 50% of first-time brides in the United States are younger than their grooms. He performs a hypothesis test to test the claim that if the percentage is different from 50%. John samples 100 first-time brides and 53 reply that they are younger than their grooms. a0.01 (10 points) (a) What are the hypotheses? nc (b) Find the test statistic. (Show all your formula and work) (Round to two decimal places as needed.) (c) Find the p-value...
The National Occupant Protection Use Survey (NOPUS) was
conducted to provide probability-based data on motorcycle helmet
use in the United States. The survey was conducted by sending
observers to randomly selected roadway sites where they collected
data on motorcycle helmet use, including the number of
motorcyclists wearing a Department of Transportation
(DOT)-compliant helmet (National Highway Traffic Safety
Administration website, January 7, 2010). Sample data consistent
with the most recent NOPUS are shown below.
a. Use the data to compute the...
According to the National Health Survey, the heights of adult males in the United States are normally distributed with mean 69.0 inches and standard deviation 2.8 inches. (a) What is the probability that an adult male chosen at random is between 64 and 74 inches tall? (Round your answer to three decimal places.) (b) What percentage of the adult male population is more than 6 feet tall? (Round your answer to one decimal place.) %
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