Math
posted by Anonymous .
Find the 95% confidence interval for the standard deviation of the lengths of pipes if a sample of 26 pipes has a standard deviation of 10 inches
Respond to this Question
Similar Questions

Statistics
data from sample of 400 cases, variable has 95% confidence interval of 54.3 to 54.7 I found the mean how do i find standard error step by step please. Standard error = sd/√n Note: sd = standard deviation; n = sample size. You'll … 
statistics
what are the mean and standard deviation of a sampling distribution consisting of samples of size 16? 
Math
The mean of a sample of 25 was calculated as xbar = 500. The sample was randomly drawn from a population whose standard deviation is 15. Estimate the population mean with 99% confidence. B.) Repeat part (a) changing the population … 
Statistics
find the 90% confidence interval for the variance and standard deviation of a sample of 16 and a standard deviation of 2.1 Assume the variable is normally distributed. 
statistics
A production process is considered to be out of control if the produced parts have lengths with a standard deviation greater than .5 mm. A sample of 41 parts yields a sample standard deviation of .58 mm. At the .05 significance level, … 
stats
The Ledd Pipe Company has received a large shipment of pipes, and a quality control inspector wishes to estimate the average diameter of these pipes. A random sample of 18 pipes produces an average diameter of 2.56 mm with a standard … 
Stats
The Ledd Pipe Company has received a large shipment of pipes, and a quality control inspector wishes to estimate the average diameter of these pipes. A random sample of 18 pipes produces an average diameter of 2.56 mm with a standard … 
stats
The president of a large university wishes to estimate the average age of the students presently enrolled. From past studies, the standard deviation ó is known to be 2 years. A sample of 50 students is selected and the mean is found … 
Statistics
1. A study of 40 people found that they could do on the average15 pull ups with a standard deviation of .6. Find the 99% confidence interval for the mean of the population. 2. A study of 50 pizza delivery workers found that they could … 
probs & stats
1. A study of 40 people found that they could do on the average15 pull ups with a standard deviation of .6. Find the 99% confidence interval for the mean of the population. 2. A study of 50 pizza delivery workers found that they could …