Draw a sample of 35 plates from a population of 45-lbs plates, where the sample mean found is 46.5, where we know the population variance for these plates is 25. What is the confidence interval for the population mean corresponding to a=0.1?
Draw a sample of 35 plates from a population of 45-lbs plates, where the sample mean...
We draw a random sample of size 25 from a normal population with a known variance of 2.4. If the sample mean is 12.5, what is the Lower Confidence Limit for the 95% confidence interval for the population mean? Include 1 decimal place in your answer
Question 14 1 pts We draw a random sample of size 25 from a normal population with variance 2.2. If the sample mean is 18.5, what is a 90% lower limit confidence interval for the population mean?
a) Suppose we know the population variance σ2-400, there is a randorm sample with i-135, and the sample size is n the mean. I. 100. Please construction a 95% confidence interval for b) Suppose we do not know the population variance, and only know the sample variable s2-400, there is a random sample with -135, and the sample size is n-25. Please construct a 95% confidence interval for the mean.
A sample of 25 observations is selected from a normal population where the population standard deviation is 15, and the sample mean is 90. Calculate the Upper Limit of the 60% confidence interval of the population mean Reminder: You only need to calculate the Upper Limit of the confidence interval.
one-sample t question A preliminary study of fall lobster catch showed that for 35 lobsters selected at random the mean weight was 2.9 pounds with a standard deviation of .6 lbs. a) find a 90% confidence interval for the population mean weight of fall lobsters b) how many lobsters should be included in the sample if we want to say with 90% confidence that population mean pounds fall within .1 lbs of the sample mean? c) the mean weight for...
A sample of 25 observations is selected from a normal population where the population standard deviation is 20 and the sample meanis 120 Calculate the Lower Limit of the 70% confidence interval of the population mean Reminders You only need to calculate the Lower Limit of the confidence interval
Asimple random sample of sien population mean is drawn from a population. The sample mean is found to bex=1208 and the sample standard deviation is found to be s 126. Construct a 90% confidence interval for the The lower bound is The upper bound is (Round to two decimal place is needed) Round to two decimal places as needed.)
Suppose you take a random sample of 30 individuals from a large population. For this sample, the sample mean is 4.2 and sample variance is 49. You wish to estimate the unknown population mean µ. (a) Calculate a 90% confidence interval for µ. (b) Calculate a 95% confidence interval for µ. (c) Based on (a) and (b), comment on what happens to the width of a confidence interval (increase/decrease) when you increase your confidence level. (d) Suppose your sample size...
Consider a z confidence interval for the population mean. If the confidence level decreases but everything else stays the same then we can expect the size of the interval to: A test was conducted to determine if HO: Mu = 52.7 should be rejected in favor of Ha: Mu > 52.7 where mu refers to the population mean. A sample was selected and the resulting test statistic was found to be 2.15. What is the p-value for the sample statistic?...
We draw a random sample of size 100 from a population with standard deviation 5. If the sample mean is 36, what is a 95% confidence interval for the population mean? Select one: [35.1775, 36.8225] b. [35.02,36.98] c. [34.712, 37.288] d. [35.17, 36.83)