In a statistical analysis, what is the minimum sample size requirement to apply a test? Is...

In a statistical analysis, what is the minimum sample size requirement to apply a test? Is there any maximum? Please provide examples for different tests (min. of two examples).

Expert Solution

In statistical analysis, the minimum sample size needed depends upon the confidence level and the confidence interval of measurement. Where, confidence level defines sureity of measurement, confidence interval defines the error margin for the measurement.

So say we have a value of study with 95% confidence level. Then with 5% confidence interval we would need a minimum sample size of 390.

Again with the same measurement but with 99% confidence level. Then with 5% confidence interval we would need a minimum sample size of 670.

there is no maximum sample size limit, higher the sample size, lower would be the error margin and finer would be the result of the experiment.

queen_honey_blossom answered 2 years ago

1. Utilizing the sample size chart, what would be the minimum sample size for the following...

1. Utilizing the sample size chart, what would be the minimum sample size for the following situations? a. one sample test ES = .8,*a = .05/2, 1- B = .90 b. two sample test (independent) ES = .8, *a = .01, 1- B = .80 c. two sample test (independent) ES = .2, *a = .05/2, 1- B = .95 d. one sample test ES = .5, *a = .01, 1- B = .80 e. two sample test ES =...

in the statistical analysis section, the authors write: “Post hoc power calculations of our sample size...

in the statistical analysis section, the authors write: “Post hoc power calculations of our sample size with 107 per group was 95% (5% significance) to detect an increase readmission rate as found in the study;…..”. Comment. [2 marks] It's an open question and I have no idea what to answer, so u have any idea please feel free to answer!

How does a large sample size affect statistical power? How does the large sample size affect...

How does a large sample size affect statistical power? How does the large sample size affect your interpretation of these particular results?

What is the appropriate statistical analysis to use: t-test for two independent samples, t-test for dependent...

What is the appropriate statistical analysis to use: t-test for two independent samples, t-test for dependent samples, ANOVA, or chi-square test of independence? Please identify and explain why it is appropriate. is asking which test should i use for each question below and why (a) A study was conducted to see whether monetary incentives to use less water during times of drought had an effect on water usage. Sixty single family homeowners were randomly assigned to one of two groups:...

Identify the variables that describe the sample. What statistical test(s) was used for the description in...

Identify the variables that describe the sample. What statistical test(s) was used for the description in the Journal article Developing a systematic approach to obstetric emergencies?

A process is in statistical control with and The control chart uses a sample size of n...

A process is in statistical control with and The control chart uses a sample size of n = 3. Specifications are at 42 ± 4. The quality characteristic is normally distributed. What conditions should we check to ensure that conclusions from a capability analysis are correct? Estimate the potential capability of the process. Estimate the actual capability of the process. How much improvement in ppm could be made in process performance if the mean could be centered at the nominal value?

These weekly exercises provide the opportunity for you to understand and apply statistical methods and analysis....

These weekly exercises provide the opportunity for you to understand and apply statistical methods and analysis. Unless otherwise stated, use 5% (.05) as your alpha level (cutoff for statistical significance). # 1. Which type of ANOVA would you use for each of the studies below? • One-way between subjects (independent groups) • One-way within subjects (repeated measures) • Two-way between subjects a. Measure the self-esteem of the same group of college students at the beginning, middle and end of their...

How are power, effect size, and sample size related? Distinguish between statistical significance and practical significance....

How are power, effect size, and sample size related? Distinguish between statistical significance and practical significance. What is the difference between a critical value and a p-value?

What is gaseous requirement of positive motility test?

What is the minimum sample size required for estimating μ for N(μ, σ2=121) to within ±...

What is the minimum sample size required for estimating μ for N(μ, σ2=121) to within ± 2 with confidence levels 95%, 90%, and 80%? a. Find the minimum sample size for the 95% confidence level. Enter an integer below. You must round up. b. Find the minimum sample size for the 90% confidence level. c. Find the minimum sample size for the 80% confidence level.

Question