Questions LLC
Login
or
Sign Up
Ask a New Question
Math
Statistics
Describe how the confidence intervals will change depending on whether the population standard deviation is known or unknown
1 answer
Cannot estimate confidence intervals if SD is unknown.
You can
ask a new question
or
answer this question
.
Related Questions
You construct three 88% confidence intervals as follows:
A. A t-interval with 6 degrees of freedom. B. A t-interval with 2
A sample of 400 items is taken from a population whose standard deviation is 10. The mean of the sample is 40. Test whether the
The standard deviation for a population is σ = 15.3. A sample of 36 observations selected from this population gave a mean
A sample of 49 observations is taken from a normal population with a standard deviation of 10. The sample mean is 55. Determine
A 95% confidence interval for a population mean, ?, is given as (18.985, 21.015). This confidence interval is based on a simple
Construct a 99% confidence interval for the population mean, ì. Assume the population has a normal distribution. A group of 19
These are the only ones that I am having problems with. Please help..
8.You are given the sample mean and the sample standard
Assume you do not know the population standard deviation. describe how you form a 90% confidence interval to estimate the
The mean of a sample of 25 was calculated as xbar = 500. The sample was randomly drawn from a population whose standard
The standard deviation for a population is σ = 15.3. A sample of 36 observations selected from this
population gave a mean equal