SOLUTION: A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that IQ scores follow a normal distribution. Her random sample of 28 IQ scores has a mea
Algebra ->
Probability-and-statistics
-> SOLUTION: A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that IQ scores follow a normal distribution. Her random sample of 28 IQ scores has a mea
Log On
Question 1157090: A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that IQ scores follow a normal distribution. Her random sample of 28 IQ scores has a mean of 100.5 and a standard deviation of 18.5. Find the 95% confidence interval for the population standard deviation based on this sample. Then complete the table below.
Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places.
What is the lower limit of the 95% confidence interval?
What is the upper limit of the 95% confidence interval?
