a firm would like to estimate the mean age of all people in the civilian labor...
a firm would like to estimate the mean age of all people in the civilian labor force. what size sample would be required to estimate the mean age of all people in the civilian labor force accurate to within 0.75 year of the estimate at the 90% confidence level, given that o`=15.26 years?
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TOPIC:Finding the required sample size for the given confidence level and the given margin of error.
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a firm would like to estimate the mean age of all people in the
civilian labor...
An admissions director wants to estimate the mean age of all students enrolled at a college....
An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within 1.7 years of the population mean. Assume the population of ages is normally distributed. (a) Determine the minimum sample size required to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 1.8 years. (b) The sample mean is 20 years of age. Using the minimum sample size with a 90% level of confidence,...
An admissions director wants to estimate the mean age of all students enrolled at a college....
An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within 1.5 years of the population mean. Assume the population of ages is normally distributed. (a) Determine the minimum sample size required to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 1.6 years. (b) The sample mean is 20 years of age. Using the minimum sample size with a 90% level of confidence,...
An admissions director wants to estimate the mean age of all students enrolled at a college....
An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within 1.1 years of the population mean. Assume the population of ages is normally distributed (a) Determine the minimum sample size required to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 1.7 years (b) The sample mean is 21 years of age. Using the minimum sample size with a 90% level of confidence,...
MATI STAT 215 QUIZON CHAPTERS, FALL 2012 Qas 1 : Fifty people in a civilian labor...
MATI STAT 215 QUIZON CHAPTERS, FALL 2012 Qas 1 : Fifty people in a civilian labor force are randomly selocted: their ages are displayed in Table 1.0. Assume that the paperation standard deviation of the ages is 12.85 years. Table 1.0 11 30 41 35 20 50 43 50 34 42 46 47 a. Determine the margin of error for ife 95% confidence interval (5 nyarks) 26 of all people in the h. Hence, find a 95% confidence interval for...
1) Out of 100 people sampled, 60 preferred Candidate A. Based on this, estimate what proportion...
1) Out of 100 people sampled, 60 preferred Candidate A. Based on this, estimate what proportion of the voting population (pp) prefers Candidate A. Use a 99% confidence level, and give your answers as decimals, to three places. _____ < P < ______ 2) You work for a marketing firm that has a large client in the automobile industry. You have been asked to estimate the proportion of households in Chicago that have two or more vehicles. You have been...
A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How...
A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 4 points with 99 % confidence assuming s equals 19.7 based on earlier studies? Suppose the doctor would be content with 90 % confidence. How does the decrease in confidence affect the sample size required? A 99% confidence level requires ____subjects. (Round up to the nearest subject.) A 90% confidence level requires _____subjects....
A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How...
A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 4 points with 99% confidence assuming s= 18.4 based on earlier studies? Suppose the doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required? Click the icon to view a partial table of critical values A 99% confidence level requires subjects (Round up to the...
In spite of the potential safety hazards, some people would like to have an Internet connection...
In spite of the potential safety hazards, some people would like to have an Internet connection in their car. A preliminary survey of adult Americans has estimated this proportion to be somewhere around 0.30. Use the given preliminary estimate to determine the sample size required to estimate the proportion of adult Americans who would like an Internet connection in their car to within 0.02 with 90% confidence.
A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How...
A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are confidence affect the sample size required? Click the icon to view a partial table of critical values. A 99% confidence level requires subjects. (Round up to the nearest subject) A 90% confidence level requires subjects. (Round up to the nearest subject.) How does the decrease in confidence affect the sample size required? O A. Decreasing the confidence level decreases the sample...
The Labor Bureau wants to estimate, at a 90% confidence level, the proportion of all households...
The Labor Bureau wants to estimate, at a 90% confidence level, the proportion of all households that receive welfare. The most conservative estimate of the sample size that would limit the margin of error to be within 0.034 of the population proportion is:
An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within 1.5 years of the population mean. Assume the population of ages is normally distributed. (a) Determine the minimum sample size required to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 1.6 years. (b) The sample mean is 20 years of age. Using the minimum sample size with a 90% level of confidence,...
An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within 1.1 years of the population mean. Assume the population of ages is normally distributed (a) Determine the minimum sample size required to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 1.7 years (b) The sample mean is 21 years of age. Using the minimum sample size with a 90% level of confidence,...
MATI STAT 215 QUIZON CHAPTERS, FALL 2012 Qas 1 : Fifty people in a civilian labor force are randomly selocted: their ages are displayed in Table 1.0. Assume that the paperation standard deviation of the ages is 12.85 years. Table 1.0 11 30 41 35 20 50 43 50 34 42 46 47 a. Determine the margin of error for ife 95% confidence interval (5 nyarks) 26 of all people in the h. Hence, find a 95% confidence interval for...
A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 4 points with 99% confidence assuming s= 18.4 based on earlier studies? Suppose the doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required? Click the icon to view a partial table of critical values A 99% confidence level requires subjects (Round up to the...
A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are confidence affect the sample size required? Click the icon to view a partial table of critical values. A 99% confidence level requires subjects. (Round up to the nearest subject) A 90% confidence level requires subjects. (Round up to the nearest subject.) How does the decrease in confidence affect the sample size required? O A. Decreasing the confidence level decreases the sample...
The Labor Bureau wants to estimate, at a 90% confidence level, the proportion of all households that receive welfare. The most conservative estimate of the sample size that would limit the margin of error to be within 0.034 of the population proportion is:
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