In an application to estimate the mean number of miles ASU faculty commute to campus, the following information was obtained:
sample size = 20
sample mean = 10 miles
sample standard deviation = 2 miles
Based on this information, the upper limit for a 95% confidence interval is?
In an application to estimate the mean number of miles ASU faculty commute to campus, the...
A survey asked college freshman how far away from their hometown is from the college campus. A random sample of 36 students is taken with a mean distance of 100 miles and a standard deviation of 30 Complete parts (a) and (b) below (a) Find the 95% confidence interval for the population mean Lower bound Upper bound (Round your answer to one decimal place) (b) Suppose you want the estimate to be within 3 miles of the population mean. Determine...
A researcher with North County Transit wishes to estimate the mean one-way commute distance for students who attend Palomar College. She wants to construct a 98% confidence interval for the distance to within 2 miles. How large of a sample must she take? Assume that commute distances are normally distributed with a standard deviation of 10.2 miles.
A researcher with North County Transit wishes to estimate the mean one-way commute distance for students who attend Palomar College. She wants to construct a 98% confidence interval for the distance to within 2 miles. How large of a sample must she take? Assume that commute distances are normally distributed with a standard deviation of 10.2 miles.
6. A researcher with North County Transit wishes to estimate the mean one-way commute distance for students who attend Palomar College. She wants to construct a 98% confidence interval for the distance to within 2 miles. How large of a sample must she take? Assume that commute distances are normally distributed with a standard deviation of 10.2 miles.
A confidence interval was used to estimate the proportion of students at Utah Valley University who commute from home to campus more than 10 miles a day. A random sample of 100 students generated the following 95% confidence interval: (0.588, 0.654). Using the information above, what size sample would be necessary to estimate the true proportion to within ± 0.06 using 95% confidence? 147 533 267 205
A random sample of 34 observations is used to estimate the population mean. The sample mean is 104.6 and the sample standard deviation is 28.8. What is the Upper Confidence Limit for a 95% confidence interval for the population mean? Round your answer to 1 decimal place.
QUESTION 1 In constructing a 95% confidence level estimate of the mean when the population standard deviation () is known what will be your score used in the formula? QUESTION 2 In constructing a 99% confidence level estimate of the mean when the population standard deviation (a) is known what will be your score used in the formula? HINT. Be sure to review page 236 "Finding Z scores from Known Areas - Special Cases and Tabel A-2. QUESTION 3 In...
A survey asked college freshman how far away from their hometown is from the college campus. A random sample of 3 students is taken with a mean distance of 100 miles and a standard deviation of Complete parts (a) and (b) below (a) Find the 95% confidence interval for the population mean Lower bound Upper bound Round your answer to one decimal place) (6) Suppose you want the time to be within 3 mies of the population mean Determine the...
Chefs: Assume the mean number of taste buds from the general population is 10,000 with a standard deviation of 950. You take a sample of 10 top chefs and find the mean number of taste buds is 10,900. Assume that the number of taste buds in top chefs is a normally distributed variable and assume the standard deviation is the same as for the general population. (a) What is the point estimate for the mean number of taste buds for...
The commute times for workers in a city are normally distributed with an unknown population mean and standard deviation. If a random sample of 37 workers is taken and results in a sample mean of 31 minutes and sample standard deviation of 5 minutes. Use Excel to find a 95% confidence interval estimate for the population mean using the Student's t-distribution. Round the final answers to two decimal places.