Must show alTthe essential calculations 5 Points (5% 1. A95% confidence interval
ID: 3219269 • Letter: M
Question
Must show alTthe essential calculations 5 Points (5% 1. A95% confidence interval for the mean p of a population is computed from a mdom sample and found to conclude: a [Check the right answer] (a) There is a 95% probability that the real population mean u is between 6 and 9 (b) There is a 95% probability that the real population mean u is between 6 and 9 (e) There is a 95% that the true and there is a 95% chance that the true margin of error is 3. (d) If we took many, many additional random samples and from each computed a (e) 95% confidence interval for p, approximately 95% of these intervals would contain All the above. None of the above. 2. For confidence level 86.6%, what is the value of Za2 observations produced amean of a standard deviation 3. A random sample of 64 Find 99% Confidence Interval for the population mean umple size but population and o are UNKNowN, and you have a random To form a 95% confidence interval, would you use: zstatistic t statistic, or neither? the value frthe above statistic you have selected Uz statistic, t statistic, or neither] Anda oberigir to get the point OverExplanation / Answer
1.95% of the time, when we calculate a confidence interval in this way, the true mean will be between the two values.
So correct answer is
a) There is 95% probability that real population mean between confidence interval (6, 9)
2.
Step 1: Subtract the confidence level (Given as 86.6 percent in the question) from 1 and then divide the result by two. This is your alpha level, which represents the area in one tail.
(1 – .866) / 2 = .067
Step 2: Subtract your result from Step 1 from 1 and then look that area up in the middle of the z-table to get the z-score:
Remaining question you can post saperately. Hope this will be helpful. thanks
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