14. Randomly selected students participated in an experiment to test their ability to determine when one...
14. Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds) has passed. Forty students yielded a sample mean of 61.8 seconds. Assuming that σ=9.2 seconds, construct and interpret a 95% confidence interval estimate of the population mean of all students.
What is the 95% confidence interval for the population mean μ?
____<μ<____
(Type integers or decimals rounded to one decimal place as needed.)
15. Salaries of 43 college graduates who took a statistics course in college have a mean, x of$69,600.
Assuming a standarddeviation, σ, of $18,844, construct a 99% confidence interval for estimating the population mean μ.
$____ <μ<$___
(Round to the nearest integer as needed.)
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14. Randomly selected students participated in an experiment to
test their ability to determine when one...
Randomly selected students participated in an experiment to test their ability to determine when one minute...
Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds) has passed. Forty students yielded a sample mean of 59.4 seconds. Assuming that sigmaσ=10.3 seconds, construct and interpret a 95% confidence interval estimate of the population mean of all students. What is the 95% confidence interval for the population u? Based on the result, is it likely that the students' estimates have a mean that is reasonably close to sixty seconds?
7.3.36 : Question Help Randomly selected students participated in an experiment to test their ability to...
7.3.36 : Question Help Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds) has passed. Forty students yielded a sample mean of 60.1 seconds. Assuming that σ = 10.1 seconds, construct and interpret a 90% confidence interval estimate of the population mean ofal students. Click here to view a t distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2...
Randomly selected statistics students participated in an experiment to test their ability to determine when 1...
Randomly selected statistics students participated in an experiment to test their ability to determine when 1 minute (or 60 seconds) has passed. 44 students yielded a sample mean of 58.3 seconds. Assume that = 9.5 seconds. a) Use a 0.05 significance level to test the claim that the population mean is equal to 60 seconds. Claim: ---Select--- < > = ≠ ≤ ≥ 60 Ho: ---Select--- < > = ≠ ≤ ≥ 60 H1: ---Select--- < > = ≠ ≤ ≥ 60 b) What...
Salaries of 34 college graduates who took a statistics course in college have a mean,x overbarx...
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Salaries of 42 42 college graduates who took a statistics course in college have a mean, x overbar x, of $ 68 comma 000 $68,000. Assuming a standard deviation, sigma σ, of $ 13 comma 437 13,437, construct a 90 90% confidence interval for estimating the population mean mu μ.
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Salaries of 44 college graduates who took a statistics course in college have a mean, x overbarx, of $62,500. Assuming a standard deviation,sigmaσ of $16,804, construct a 99% confidence interval for estimating the population mean μ. $____less than<μ<less than<$____ (Round to the nearest integer as needed.)
6. Give a correct interpretation of a 99% confidence level of 0.328 <p < 0.486. (1...
6. Give a correct interpretation of a 99% confidence level of 0.328 <p < 0.486. (1 point) We are 99% confident that the interval frorn 0 328 to 0 486 actually does contain the true value of the population mean μ There is a 99% chance that the true value ofμ will fall between 0 328 and 0 486. 99% of sample means fall between 0328 and 0486. We are confident that 99% of values between 0.328 and 0 486...
7.3.36 : Question Help Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds) has passed. Forty students yielded a sample mean of 60.1 seconds. Assuming that σ = 10.1 seconds, construct and interpret a 90% confidence interval estimate of the population mean ofal students. Click here to view a t distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2...
7. You want to estimate the mean weight loss of people one year after using a popular weight-loss (1 point) program being advertised on TV. How many people on that program must be surveyed if we want to be 95% confident that the sample mean weight loss is within 0.25 ib of the true population mean? Assume that the population standard deviation is known to be 10.6 lb. 6907 0 4865 O 84 O6906 3. Given the standard deviation of...
Salaries of 35 college graduates who took a statistics course in college have a mean, x, of $65,200. Assuming a standard deviation, σ, of$12,972, construct a 90% confidence interval for estimating the population mean μ Click here to view page 1 of the standard normal distribution table Click here to view page 2 of the standard normal distribution table (Round to the nearest integer as needed)
6. Give a correct interpretation of a 99% confidence level of 0.328 <p < 0.486. (1 point) We are 99% confident that the interval frorn 0 328 to 0 486 actually does contain the true value of the population mean μ There is a 99% chance that the true value ofμ will fall between 0 328 and 0 486. 99% of sample means fall between 0328 and 0486. We are confident that 99% of values between 0.328 and 0 486...
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