Danielsoper
danielsoper.com › statcalc › calculator.aspx
Free Confidence Interval Calculator for the Population Mean - Free Statistics Calculators
This calculator will compute the 99%, 95%, and 90% confidence intervals for the mean of a normal population, given the sample mean, the sample size, and the sample standard deviation.
Calculator.net
calculator.net › home › math › confidence interval calculator
Confidence Interval Calculator
Use this calculator to compute the confidence interval or margin of error, assuming the sample mean most likely follows a normal distribution. Use the Standard Deviation Calculator if you have raw data only. A confidence interval is a statistical measure used to indicate the range of estimates within which an unknown statistical parameter is likely to fall. If the parameter is the population mean, the confidence interval is an estimate of possible values of the population mean.
[Q] Use confidence intervals to determine sample size?
The width of your confidence intervals is dependent on the standard deviation of your sample, not its mean. If you assume some value for the standard devation, you can compute the width of your target confidence interval using the t distribution. Solve for n to get your target width. More on reddit.com
7
11
December 24, 2021Hello! I need help with the Ti-84 calculator. “Construct a 99% confidence interval for the population mean, μ. Assume the population has a normal distribution. A group of 19 randomly selected students has a mean age of 22.4 years with a standard deviation of 3.8 years.” Here are my attempts so far:
Hi u/frostysquiid , Please read the following message. You are required to explain your post and show your efforts. (Rule 1) If you haven't already done so, please add a comment below explaining your attempt(s) to solve this and what you need help with specifically. See the sidebar for advice on 'how to ask a good question'. Don't just say you "need help" with your problem. This is a reminder for all users. Failure to follow the rules will result in the post being removed. Thank you for understanding. I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com
9
2
August 29, 2022Select-statistics
select-statistics.co.uk › home › population mean – confidence interval
Population Mean - Confidence Interval - Select Statistical Consultants
February 24, 2016 - If the blood pressure of a further 900 adults were measured then this confidence interval would reduce to between 69.51 and 70.49mmHg (assuming the estimated mean and standard deviation remained the same). This calculator uses the following formula for the confidence interval, ci: ... Zα/2 is the critical value of the Normal distribution at α/2 (e.g. for a confidence level of 95%, α is 0.05 and the critical value is 1.96), μ is the sample mean, s is the sample standard deviation, n is the sample size and N is the population size.
StatsKingdom
statskingdom.com › confidence-interval-calculator.html
Confidence Interval Calculator - with calculation steps
Excluded - The calculator will exclude the outliers before calculating the average and the standard deviation.You should remove outliers only if you identify them as invalid observations! Confidence Level (CL) - The certainty level that the true value of the estimated parameter will be in the confidence interval. Do you know the population SD (σ)? - this option relevant for the mean ...
Sample-size
sample-size.net › confidence-interval-proportion
Confidence interval for a proportion | Sample Size Calculators
Statistical calculators, sample size, free, confidence interval, proportion, mean
Socscistatistics
socscistatistics.com › confidenceinterval › default3.aspx
Confidence Interval Calculator
An easy confidence interval calculator using a Z statistic to estimate a population mean from a single sample. Provides full details of workings.
Statisticscalculators
statisticscalculators.com › confidence-interval-calculator
Confidence Interval Calculator – Powered by 365 Data Science
Do you need to find a Confidence Interval Calculator quickly? Input your data to obtain the metric, step-by-step calculation, Python and R codes, and more. Calculate now.
Sample-size
sample-size.net › confidence-interval-mean
Confidence interval for a mean | Sample Size Calculators
Statistical calculators, sample size, free, confidence interval, proportion, mean
Statistics LibreTexts
stats.libretexts.org › learning objects › interactive statistics
18: Confidence Interval Calculator for a Mean With Statistics (Sigma Unknown) - Statistics LibreTexts
December 18, 2023 - Fill in the sample size (n), the sample mean (\(\bar{x}\)), the sample standard deviation (s), and the confidence level (CL). Write the confidence level as a decimal. For example, for a 95% confidence level, enter 0.95 for CL.
365 Data Science
365datascience.com › calculators › confidence-interval-calculator
Confidence Interval Calculator
Do you need to find a Confidence Interval Calculator quickly? Input your data to obtain the metric, step-by-step calculation, Python and R codes, and more. Calculate now.
YouTube
youtube.com › watch
Calculate a confidence interval for a population mean (standard deviation unknown) - Calculator #1 - YouTube
This is the first video on a question related to Objective: Calculate a confidence interval for a population mean (standard deviation unknown) - Calculator
Published July 28, 2023
Omni Calculator
omnicalculator.com › statistics › confidence-interval
Confidence Interval Calculator
December 13, 2016 - Enter the mean of your sample. Input the standard error or standard deviation and sample size based on the selection in the second point. You can use our standard deviation calculator if needed. Choose your desired confidence level. In case of the confidence interval for the population proportion, you need to provide the sample proportion and sample size instead.
Statistics LibreTexts
stats.libretexts.org › campus bookshelves › oxnard college › statistics calculators for math 105
9: Confidence Interval for a Population Mean Given Statistics - Statistics LibreTexts
May 10, 2025 - This calculator computes the confidence interval for a population mean given statistics.
MathsisFun
mathsisfun.com › data › confidence-interval-calculator.html
Confidence Interval Calculator
Enter how many in the sample, the mean and standard deviation, choose a confidence level, and the calculation is done live. Read Confidence Intervals to learn more. ... Use the Standard Deviation Calculator to calculate your sample's standard deviation and mean. Caution: you should really use the standard deviation of the entire population!
Socscistatistics
socscistatistics.com › confidenceinterval › default2.aspx
Confidence Interval Calculator: Single-Sample T Statistic
An easy confidence interval calculator for estimating a population mean from a single sample. Provides full details of workings.
YouTube
youtube.com › watch
Confidence Interval for Population Mean using TI 84 Graphing ...
Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
Omni Calculator
omnicalculator.com › statistics › 90-confidence-interval
90% Confidence Interval Calculator
March 14, 2024 - Enter the mean (average) of your sample (x̅). Fill in the standard deviation (s). Type in your sample size — number of measurements taken (n). You don't have to manually enter the confidence level, as there is a 90% set already. Keep in mind that you can change it anytime. You don't need to type in the z-score value. This row automatically reacts to the confidence interval row and will change accordingly.
SurveyMonkey
surveymonkey.com › mp › margin-of-error-calculator
How To Calculate Margin Of Error (free Calculator With Examples)
Take the square root of your sample size and divide it by your population standard deviation. Multiply the result by the z-score that's consistent with your desired confidence interval according to the following table.
MeasuringU
measuringu.com › calculators › ci-calc
Confidence Interval Calculator – MeasuringU
Compute confidence intervals around continuous data using either raw or summary data · 3300 E 1st Ave. Suite 370 Denver, Colorado 80206 United States
StatsKingdom
statskingdom.com › difference-confidence-interval-calculator.html
Calculates the confidence interval for the difference between two means - with calculation steps
Calculates the confidence interval for the difference between two population means: equal variances, unequal variances, and paired groups.