From a survey of 200 coworkers you find that 68 would like the company to provide...
From a survey of 200 coworkers you find that 68 would like the company to provide on-site day care.
a) What is the value of the sample proportion p̂ ?
b) What is the standard error of the sample proportion?
c) Construct an approximate 95% confidence interval for the true proportion p by taking plus or minus 2 SEs ±2 SEs
from the sample proportion.
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From a survey of 200 coworkers you find that 68 would like the
company to provide...
From a survey of 250 coworkers you find that 80 would like the company to provide...
From a survey of 250 coworkers you find that 80 would like the company to provide on-site day care. a) What is the value of the sample proportion p? b) What is the standard error of the sample proportion? c) Construct an approximate 95% confidence interval for the true proportion p by taking t2 SEs from the sample proportion a)p (Type an integer or a decimal.) b) The standard error of the sample proportion is (Round to three decimal places...
A survey of 300 students is selected randomly on a large university campus. They are asked...
A survey of 300 students is selected randomly on a large university campus. They are asked if they usea laptop in class to take notes. Suppose that based on the survey, 135 of the 300 students responded "yes." a) What is the value of the sample proportion p? b) What is the standard error of the sample proportion? c) Construct an approximate 95% confidence interval for the true proportion p by taking 2 SEs from the sample proportion. a) p...
From a survey of coworkers you find that 56% of 150 have already received this year's...
From a survey of coworkers you find that 56% of 150 have already received this year's flu vaccine. An approximate 98% confidence interval is (0.466, 0.654). a) How would the confidence interval change if the sample size had been 2400 instead of 150? b) How would the confidence interval change if the confidence level had been 99% instead of 98%? c) How would the confidence interval change if the confidence level had been 95% instead of 98%?
From a random sample of workers at a large corporation you find that 58% of 200...
From a random sample of workers at a large corporation you find that 58% of 200 went on a vacation last year away from home for at least a week. An approximate 95% confidence interval is (0.50, 0.66). What is the correct interpretation? week O A. There is a 95% chance that a random selected coworker has gone on a vacation last year away from home for at least k OB. 95% of the coworkers fall in the interval (0.50,...
Using the sample of size 200, construct a 95% confidence interval for the proportion of Youth...
Using the sample of size 200, construct a 95% confidence interval for the proportion of Youth Survey participants who would describe themselves as being about the right weight (Round to three decimal places.) Sample Proportion = Margin of error Lower limit Upper limit Does your 95% confidence interval based on the sample of size 200 include the true proportion of Youth Survey participants who would describe themselves as being about the right weight? O Yes O No
x Suppose you carried out a survey with 200 respondents. 45% of the respondents answered the...
x Suppose you carried out a survey with 200 respondents. 45% of the respondents answered the question of interest in a particular way and your desired confidence level was 95%. Construct the confidence interval for true proportion of respondents who answered the question of interest. Interpret the interval. What does it mean by 95% confidence
An online site presented this question, "Would the recent norovirus outbreak deter you from taking a...
An online site presented this question, "Would the recent norovirus outbreak deter you from taking a cruise?" Among the 34,289 people who responded,61% answered "yes." Use the sample data to construct a 95%confidence interval estimate for the proportion of the population of all people who would respond "yes" to that question. Does the confidence interval provide a good estimate of the population proportion? _<p<_ (Round to three decimal places as needed.) Does the confidence interval provide a good estimate of...
1. You survey 850 teenagers and find that 196 of them smoke cigarettes. a. What is...
1. You survey 850 teenagers and find that 196 of them smoke cigarettes. a. What is the sample proportion? b. Write a 95% confidence interval for the proportion of teenagers who smoke cigarettes. c. Write a sentence interpreting this interval. c. What is the margin of error for this interval? d. Suppose we’d like the margin of error to be less than 1%? Using the same sample proportion from part a, how big of a sample would we need?
In examining the credit accounts of a department store, an auditor would like to estimate the tru...
In examining the credit accounts of a department store, an auditor would like to estimate the true mean account error (book value – audited value). To do so, the auditor selected a random sample of 50 accounts and found the mean account error to be $60 with a standard deviation of $30. a. Construct a 95% confidence interval for the population mean account error. What conclusion can be made from this confidence interval? b. How large a sample is actually...
help！ In examining the credit accounts of a department store, an auditor would like to estimate...
help！ In examining the credit accounts of a department store, an auditor would like to estimate the true mean account error (book value – audited value). To do so, the auditor selected a random sample of 50 accounts and found the mean account error to be $60 with a standard deviation of $30. a.Construct a 95% confidence interval for the population mean account error. What conclusion can be made from this confidence interval? b.How large a sample is actually needed...
From a survey of 250 coworkers you find that 80 would like the company to provide on-site day care. a) What is the value of the sample proportion p? b) What is the standard error of the sample proportion? c) Construct an approximate 95% confidence interval for the true proportion p by taking t2 SEs from the sample proportion a)p (Type an integer or a decimal.) b) The standard error of the sample proportion is (Round to three decimal places...
A survey of 300 students is selected randomly on a large university campus. They are asked if they usea laptop in class to take notes. Suppose that based on the survey, 135 of the 300 students responded "yes." a) What is the value of the sample proportion p? b) What is the standard error of the sample proportion? c) Construct an approximate 95% confidence interval for the true proportion p by taking 2 SEs from the sample proportion. a) p...
From a random sample of workers at a large corporation you find that 58% of 200 went on a vacation last year away from home for at least a week. An approximate 95% confidence interval is (0.50, 0.66). What is the correct interpretation? week O A. There is a 95% chance that a random selected coworker has gone on a vacation last year away from home for at least k OB. 95% of the coworkers fall in the interval (0.50,...
Using the sample of size 200, construct a 95% confidence interval for the proportion of Youth Survey participants who would describe themselves as being about the right weight (Round to three decimal places.) Sample Proportion = Margin of error Lower limit Upper limit Does your 95% confidence interval based on the sample of size 200 include the true proportion of Youth Survey participants who would describe themselves as being about the right weight? O Yes O No
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