Confidence interval using Normal Distribution

Related BrainMass Solutions

• Difference between confidence interval and significance level

  This statistic follows standard normal distribution.

• 90%, 95% and 99% confidence intervals using normal distribution

  The solution gives detailed steps on determining the 90%, 95% and 99% confidence intervals using normal distribution in real example.

• Estimation of Proportion Using Normal distribution

  estimated using Normal distribution

• Find confidence interval using standard normal distribution

  So n=984 The solution gives detailed steps on solving four questions: finding confidence interval using standard normal distribution.

• Confidence interval and t-distributions

  Use a normal distribution or a t-distribution to construct a 90% confidence interval or the mean. Which distribution should be used to construct the 90% confidence interval? A.

• Estimation using Normal Distribution

  is estimated using normal distribution

• Construction of confidence intervals and proper interpretation

  Standard error of estimate is the standard deviation of the distribution of sample statistics. Example: Here we present an example of constructing the 95% confidence interval using the normal distribution for a population mean.

• Building confidence intervals for proportions

  So P-value=P(Z>1.22)=0.1112 using normal distribution table d.

• Normal Distribution, Mean Difference, and Boxplot

  Using the above rule, we know that both and follow normal distributions, with means and ; and variance and . In order to build the confidence interval, we need to know the variance and distribution of the random variable.

• Confidence Interval for Mean: mpg 2009 sedans

  Construct a 95% confidence interval estimate for the population mean mpg of 2009 sedans priced under $20000 assuming a normal distribution.