Underwater mortgages ~ A mortgage is termed “underwater” if the amount owed is greater than the...
Underwater mortgages ~ A mortgage is termed “underwater” if the amount owed is greater than the value of the property that is mortgaged. Using a 2010 Rasmussen poll, investigators calculated a 95% confidence interval for the actual proportion of homeowners in US that have mortgages that were underwater. The confidence interval is given by (0.3106, 0.3894). What is the margin of error?
Give the exact answer as a decimal.
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Underwater mortgages ~ A mortgage is termed “underwater” if the
amount owed is greater than the...
Underwater mortgages ~ A mortgage is termed “underwater” if the amount owed is greater than the...
Underwater mortgages ~ A mortgage is termed “underwater” if the amount owed is greater than the value of the property that is mortgaged. Using a 2010 Rasmussen poll, investigators calculated a 95% confidence interval for the actual proportion of homeowners in US that have mortgages that were underwater. The confidence interval is given by (0.3249, 0.3809). What is the sample proportion? Give the exact answer as a decimal.
all answers please 3. The teachers union is concerned about the amount of time teachers spend...
all answers please
3. The teachers union is concerned about the amount of time teachers spend each week doing schoolwork at home. A simple random sample of 56 teachers had a mean of 8.0 hours per week working at home after school. Assume that the population standard deviation is 1.5 hours per week. a) Construct a 95% confidence interval estimate for the mean number of hours per week a teacher spends working at home. b) Does the confidence interval support...
12 of 13 ID: MST.CI.CIP.01.0030.STAT301 [1 point] A statistics lecturer poses the following question to her...
12 of 13 ID: MST.CI.CIP.01.0030.STAT301 [1 point] A statistics lecturer poses the following question to her students as homework: 'Suppose I collected a sample and calculated the sample proportion. If I construct a 90% confidence interval for the population proportion and a 95% confidence interval for the population proportion, which of these intervals will be wider?' Three students provide their answers as follows: Tim: 'The 90% confidence interval will be wider.' Trevor: 'The 95% confidence interval will be wider.' Tracy:...
someone help me answer this question Previous Page Next Page Page 1 of 18 Question 1...
someone help me answer this question
Previous Page Next Page Page 1 of 18 Question 1 (1 point) Census - In 2020, Pew Research conducted a poll to examine how likely a person was to participate in the 2020 US Census based on their age. In a random sample of US adults aged 50 years or older, 84.56% said they were likely to participate in the Census. The estimated standard error of the sample proportion is 0.0107. A normal distribution...
all answers please!! 1. A company that produces brendis concerned about the distribution of the amount of sodiu...
all answers please!!
1. A company that produces brendis concerned about the distribution of the amount of sodium in its bread. The company takes a simple random sample of 100 slices of bread and compute the sample mean to be 103 milligrams of sodium per slice. Assume that the population standard deviation is 10 milligrams a) Construct a 95% confidence interval estimate for the mean sedium level. b) Construct a 99% confidence intervalestime for the mean sodium level. 2. Fill...
1.(10) Assume that the proportion of successes in a population is p. If simple random samples...
1.(10) Assume that the proportion of successes in a population is p. If simple random samples of size n are drawn from the population and the proportions, p. of successes in the samples are calculated, then the distribution of the sample proportions p is normal. What are the mean and standard deviation of this Normal distribution? Hp = 2.(10) How large do the number of successes and the number of failures in a sample have to be in order to...
Suppose a poll conducted at a certain college during their most recent spring semester asked 695...
Suppose a poll conducted at a certain college during their most recent spring semester asked 695 college students whether or not a privately owned dining hall should be allowed on campus. The response "Yes, it should" was selected by 38% of the respondents. (a) Suppose the researchers who conducted the poll reported "For results based on the total college population, once can say with 95% confidence that the margin of sampling error is no greater than 4 percentage points." Explain...
6.5 Prop 19 in California: In a 2010 Survey USA poll, 70% of the 119 respondents...
6.5 Prop 19 in California: In a 2010 Survey USA poll, 70% of the 119 respondents between the ages of 18 and 34 said they would vote in the 2010 general election for Prop 19, which would change California law to legalize marijuana and allow it to be regulated and taxed. At a 95% confidence level, this sample has an 8% margin of error. Based on this information, determine if the following statements are true or false, and explain your...
The Affordable Care Act (ACA) signed into law by President Barrack Obama in 2010 was the...
The Affordable Care Act (ACA) signed into law by President Barrack Obama in 2010 was the most significant regulatory reform of the United States healthcare system since the passage of Medicare and Medicaid in 1965. The law was designed to expand insurance coverage and reduce the costs of health care. Some elements of the law such are banning insurance companies from denying coverage to people with pre-existing conditions are popular while other provisions such as the individual mandate are unpopular....
2. Suppose that a random sample of 41 state college students is asked to measure the...
2. Suppose that a random sample of 41 state college students is asked to measure the length of their right foot in centimeters. A 90% confidence interval for the mean foot length for students at this university turns out to be (21.709, 25.091). If we now calculated a 95% confidence interval, would the new confidence interval be wider than or narrower than or the same as the original? b. Suppose two researchers want to estimate the proportion of American college...
all answers please
3. The teachers union is concerned about the amount of time teachers spend each week doing schoolwork at home. A simple random sample of 56 teachers had a mean of 8.0 hours per week working at home after school. Assume that the population standard deviation is 1.5 hours per week. a) Construct a 95% confidence interval estimate for the mean number of hours per week a teacher spends working at home. b) Does the confidence interval support...
12 of 13 ID: MST.CI.CIP.01.0030.STAT301 [1 point] A statistics lecturer poses the following question to her students as homework: 'Suppose I collected a sample and calculated the sample proportion. If I construct a 90% confidence interval for the population proportion and a 95% confidence interval for the population proportion, which of these intervals will be wider?' Three students provide their answers as follows: Tim: 'The 90% confidence interval will be wider.' Trevor: 'The 95% confidence interval will be wider.' Tracy:...
someone help me answer this question
Previous Page Next Page Page 1 of 18 Question 1 (1 point) Census - In 2020, Pew Research conducted a poll to examine how likely a person was to participate in the 2020 US Census based on their age. In a random sample of US adults aged 50 years or older, 84.56% said they were likely to participate in the Census. The estimated standard error of the sample proportion is 0.0107. A normal distribution...
all answers please!!
1. A company that produces brendis concerned about the distribution of the amount of sodium in its bread. The company takes a simple random sample of 100 slices of bread and compute the sample mean to be 103 milligrams of sodium per slice. Assume that the population standard deviation is 10 milligrams a) Construct a 95% confidence interval estimate for the mean sedium level. b) Construct a 99% confidence intervalestime for the mean sodium level. 2. Fill...
1.(10) Assume that the proportion of successes in a population is p. If simple random samples of size n are drawn from the population and the proportions, p. of successes in the samples are calculated, then the distribution of the sample proportions p is normal. What are the mean and standard deviation of this Normal distribution? Hp = 2.(10) How large do the number of successes and the number of failures in a sample have to be in order to...
Suppose a poll conducted at a certain college during their most recent spring semester asked 695 college students whether or not a privately owned dining hall should be allowed on campus. The response "Yes, it should" was selected by 38% of the respondents. (a) Suppose the researchers who conducted the poll reported "For results based on the total college population, once can say with 95% confidence that the margin of sampling error is no greater than 4 percentage points." Explain...
2. Suppose that a random sample of 41 state college students is asked to measure the length of their right foot in centimeters. A 90% confidence interval for the mean foot length for students at this university turns out to be (21.709, 25.091). If we now calculated a 95% confidence interval, would the new confidence interval be wider than or narrower than or the same as the original? b. Suppose two researchers want to estimate the proportion of American college...
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