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
.
Similar Questions
These are the only ones that I am having problems with. Please help..
8.You are given the sample mean and the sample standard
Top answer:
You are given the sample mean and the sample standard deviation. Use this information to construct
Read more.
Assume you do not know the population standard deviation. describe how you form a 90% confidence interval to estimate the
Top answer:
90% = mean ± 1.645 SEm SEm = SD/√n You need to know mean, SD and n for your sample.
Read more.
The mean of a sample of 25 was calculated as xbar = 500. The sample was randomly drawn from a population whose standard
Top answer:
To estimate the population mean with 99% confidence, we can use the formula for a confidence
Read more.
The standard deviation for a population is σ = 15.3. A sample of 36 observations selected from this population gave a mean
Top answer:
In a recent study, 25 males used a new weight-loss supplement, and all but 6 of them experienced
Read more.
The standard deviation for a population is σ = 15.3. A sample of 36 observations selected from this
population gave a mean equal
Top answer:
To construct confidence intervals for the population mean (µ) based on a sample, you can use the
Read more.
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ.
Top answer:
5.73 ft < σ < 10.07 ft
Read more.
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ.
Top answer:
The correct answer is: $559 < σ < $1953 To find the confidence interval for the population standard
Read more.
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ.
Top answer:
The 95% confidence interval for the population standard deviation σ is calculated using the
Read more.
A statistics practitioner would like to estimate a population mean to within 50 units with 99% confidence given that the
Top answer:
Formula: n = [(z-value * sd)/E]^2 ...where n = sample size, use a z-table to represent the 99%
Read more.
1000 scientists create 95% confidence intervals for parameters of interest. If they all compute the confidence intervals
Top answer:
I would hope at least 950 of them get it.
Read more.
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
How large a sample should be selected to provide a 95% confidence interval with a margin of error of 10 (to the nearest whole
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
Suppose a population is sampled and the sample mean is 16.8. The sample standard deviation is 6.0 I am to assume the sample is
suppose a random sample of 360 students is drawn form a population of students. Among sampled, the average IQ score is 12 with
Use the given confidence level and sample data to find a confidence interval for the population standard deviation. Assume that
Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these
