a. You wish to compute the 95% confidence interval for the population proportion. How large a...
a. You wish to compute the 95% confidence interval for the population proportion. How large a sample should you draw to ensure that the sample proportion does not deviate from the population proportion by more than 0.12? No prior estimate for the population proportion is available. Round intermediate calculations to at least 4 decimal places and "z" value to 3 decimal places. Round up your answer to the nearest whole number.)
Sample Size -
b. A business student is interested in estimating the 90% confidence interval for the proportion of students who bring laptops to campus. He wishes a precise estimate and is willing to draw a large sample that will keep the sample proportion within eight percentage points of the population proportion. What is the minimum sample size required by this student, given that no prior estimate of the population proportion is available? Round intermediate calculations to at least 4 decimal places and "z" value to 3 decimal places. Round up your answer to the nearest whole number.)
Minimum Sample Size -
Homework Answers
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a. You wish to compute the 95% confidence interval for the
population proportion. How large a...
A business student is interested in estimating the 95% confidence interval for the proportion of students...
A business student is interested in estimating the 95% confidence interval for the proportion of students who bring laptops to campus. He wishes a precise estimate and is willing to draw a large sample that will keep the sample proportion within six percentage points of the population proportion. What is the minimum sample size required by this student, given that no prior estimate of the population proportion is available? Use Table 1. (Round intermediate calculations to 4 decimal places and...
a. An analyst from an energy research institute in California wishes to estimate the 95% confidence...
a. An analyst from an energy research institute in California wishes to estimate the 95% confidence interval for the average price of unleaded gasoline in the state. In particular, she does not want the sample mean to deviate from the population mean by more than $0.06. What is the minimum number of gas stations that she should include in her sample if she uses the standard deviation estimate of $0.35, as reported in the popular press? Round intermediate calculations to...
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who support labeling...
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 4% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 79% of the respondents said they support labeling legislation for GMOs. (c) Compare the results from parts (a) and (b). (a)...
Compute the 95% confidence interval estimate for the population proportion, p, based on a sample size...
Compute the 95% confidence interval estimate for the population proportion, p, based on a sample size of 100 when the sample proportion, is equal to 0.28. What is the upper bound of this confidence interval? (Round to three decimal places as needed.)
An analyst from an energy research institute in California wishes to estimate the 99% confidence interval...
An analyst from an energy research institute in California wishes to estimate the 99% confidence interval for the average price of unleaded gasoline in the state. In particular, she does not want the sample mean to deviate from the population mean by more than $0.13. What is the minimum number of gas stations that she should include in her sample if she uses the standard deviation estimate of $0.35, as reported in the popular press? (You may find it useful...
Construct a confidence interval of the population proportion at the given level of confidence. x= 45,...
Construct a confidence interval of the population proportion at the given level of confidence. x= 45, n 150, 95% confidence The lower bound is The upper bound is (Round to three decimal places as needed.) A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.04 with 95% confidence if (a) she uses a previous estimate of 0.32? (b) she does not...
n= A researcher wishes to estimate, with 90% confidence, the population proportion of adults who support...
n= A researcher wishes to estimate, with 90% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 5% of the true proportion a) No preliminary estimate is available. Find the minimum sample size needed () Find the minimum sample size nooded, using a prior study that found that 76% of the respondents said they support labeling legislation for GMOs (c) Compare the results from parts (a) and (b)....
A researcher wishes to estimate with 95% confidence, the population proportion of adults who think the...
A researcher wishes to estimate with 95% confidence, the population proportion of adults who think the president of heir country can control the price of gasoline. Her estimate must be accurate w in 4% of the true proportion. a) No preliminary estimate is available. Find the minimum sample sze needed b) Find the minimum sample size needed, using a prior study that found that 34% of the respondents said they think their president can control the price of gasoline. c)...
A researcher wishes to estimate, with 99% confidence, the population proportion of a) No preliminary estimate...
A researcher wishes to estimate, with 99% confidence, the population proportion of a) No preliminary estimate is available Find the minimum b i F ind the minimum sapi·sue needed using a prior study that found that 32% of the respondents said they think their president c) Compare the results from parts (a) and (b) who think the president of their country can control the price of gasoline Her estimate must be accurate within 4% ofthe tw proportio control the price...
is pos5100 n= by A researcher wishes to estimate with 90% confidence, the population proportion of...
is pos5100 n= by A researcher wishes to estimate with 90% confidence, the population proportion of adults who support labeling logislation for genetically modified organisms (CMOS) Her estimate must be accurate within 6% of the true proportion io (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 73% of the respondents said they support labeling legislation for GMOs (c) Compare the results from...
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 4% of the true proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 79% of the respondents said they support labeling legislation for GMOs. (c) Compare the results from parts (a) and (b). (a)...
Compute the 95% confidence interval estimate for the population proportion, p, based on a sample size of 100 when the sample proportion, is equal to 0.28. What is the upper bound of this confidence interval? (Round to three decimal places as needed.)
Construct a confidence interval of the population proportion at the given level of confidence. x= 45, n 150, 95% confidence The lower bound is The upper bound is (Round to three decimal places as needed.) A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.04 with 95% confidence if (a) she uses a previous estimate of 0.32? (b) she does not...
n= A researcher wishes to estimate, with 90% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 5% of the true proportion a) No preliminary estimate is available. Find the minimum sample size needed () Find the minimum sample size nooded, using a prior study that found that 76% of the respondents said they support labeling legislation for GMOs (c) Compare the results from parts (a) and (b)....
A researcher wishes to estimate with 95% confidence, the population proportion of adults who think the president of heir country can control the price of gasoline. Her estimate must be accurate w in 4% of the true proportion. a) No preliminary estimate is available. Find the minimum sample sze needed b) Find the minimum sample size needed, using a prior study that found that 34% of the respondents said they think their president can control the price of gasoline. c)...
A researcher wishes to estimate, with 99% confidence, the population proportion of a) No preliminary estimate is available Find the minimum b i F ind the minimum sapi·sue needed using a prior study that found that 32% of the respondents said they think their president c) Compare the results from parts (a) and (b) who think the president of their country can control the price of gasoline Her estimate must be accurate within 4% ofthe tw proportio control the price...
is pos5100 n= by A researcher wishes to estimate with 90% confidence, the population proportion of adults who support labeling logislation for genetically modified organisms (CMOS) Her estimate must be accurate within 6% of the true proportion io (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 73% of the respondents said they support labeling legislation for GMOs (c) Compare the results from...
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