how do you calculate 95% confidence interval using population variance

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Using the information below, calculate a 95% T-confidence interval for the sample population. You have the...

Using the information below, calculate a 95% T-confidence interval for the sample population. You have the mean, standard deviation and the sample size, all you have left to find is the T-critical value and you can calculate the interval. PLEASE SHOW WORK Once you calculate the confidence interval you will need to interpret your interval and explain what this means in words. Does your data follow a normal distribution? Vehicle type/class Year Make Model Price QUALITATIVE QUANTITATIVE QUALITATIVE QUALITATIVE QUANTITATIVE...

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At a confidence level of 95% a confidence interval for a population proportion is determined to...

At a confidence level of 95% a confidence interval for a population proportion is determined to be 0.65 to 0.75. If the sample size had been larger and the estimate of the population proportion the same, this 95% confidence interval estimate as compared to the first interval estimate would be A. the same B. narrower C. wider

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one can calculate the 95% confidence interval for the mean with the population standard deviation knowing...

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One can calculate the 95% confidence interval for the mean with the population standard deviation known....

One can calculate the 95% confidence interval for the mean with the population standard deviation known. This will give us an upper and a lower confidence limit. What happens if we decide to calculate the 99% confidence interval? Describe how the increase in the confidence level has changed the width of the confidence interval. Do the same for the confidence interval set at 80%. Include an example with actual numerical values for the intervals in your post to help with...

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One can calculate the 95% confidence interval for the mean with the population standard deviation known....

One can calculate the 95% confidence interval for the mean with the population standard deviation known. This will give us an upper and a lower confidence limit. What happens if we decide to calculate the 99% confidence interval? Your task for this discussion is as follows: Describe how the increase in the confidence level has changed the width of the confidence interval. Do the same for the confidence interval set at 80%. Include an example with actual numerical values for...

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