Question

In: Statistics and Probability

90% Ci = (76.4599, 200.4367) 95% Ci =  (64.5898, 212.3068) 99% Ci = (41.2264, 235.67) Would an...

90% Ci = (76.4599, 200.4367)

95% Ci =  (64.5898, 212.3068)

99% Ci = (41.2264, 235.67)

Would an 85% confidence interval be narrower or wider than the intervals computed above? Explain your reasoning.

If the sample size consisted of 60 instead of 30, what would happen to the confidence intervals computed above? Explain your reasoning.

Solutions

Expert Solution


Related Solutions

Problem:      Construct and interpret a 90%, 95%, and 99% confidence interval for the mean heights...
Problem:      Construct and interpret a 90%, 95%, and 99% confidence interval for the mean heights of either adult females or the average height of adult males living in America. Do not mix genders in your sample as this will skew your results. Gather a random sample of size 30 of heights from your friends, family, church members, strangers, etc. by asking each individual in your sample his or her height. From your raw data convert individual heights to inches....
construct 90, 95, and 99 percent confidence intervals for the population mean, and state the practical...
construct 90, 95, and 99 percent confidence intervals for the population mean, and state the practical and probabilistic interpretations of each. Indicate which interpretation you think would be more appropriate to use. Explain why the three intervals that you construct are not of equal width. Indicate which of the three intervals you would prefer to use as an estimate of the population mean, and state the reason for your choice. In a length of hospitalization study conducted by several cooperating...
Calculate and interpret 90%, 95%, and 99% confidence intervals for both groups of approaches in question...
Calculate and interpret 90%, 95%, and 99% confidence intervals for both groups of approaches in question 5. Also provide 90%, 95%, and 99% confidence intervals for both groups when the sample size is increased from 10 to 150. Interpret all statistics. a. A random sample of 15 families representing three social classes has been observed for the frequency with which the parents administer physical punishment to the children over a period of a week. Are the differences significant? Use the...
What are the z values for the following confidence intervals: A) 99% B) 95% C) 90%...
What are the z values for the following confidence intervals: A) 99% B) 95% C) 90% D) 80% E) 70% Please explain also so I can learn how you are doing it.
Calculate the 99%, 95%, and 90% confidence interval for the following information. Identify how these confidence...
Calculate the 99%, 95%, and 90% confidence interval for the following information. Identify how these confidence intervals are similar and how they are different. Explain why. (70 points) x̄ = 55 s = 15 n = 101 The 99% Confidence Interval: The 95% Confidence Interval: The 90% Confidence Interval: Similarities: Differences: Why?
Discuss how choosing a significance level of 90%, 95%, or 99% might influence the results of...
Discuss how choosing a significance level of 90%, 95%, or 99% might influence the results of our analysis as well as the factors you might consider in making your choice. Consider and discuss how doing the wrong thing (alpha risk, implementing when the improvements aren’t significant) might be perceived differently than choosing to do nothing yet (beta risk, going back for more design when the improvements are significant). How might you approach this analysis of your two data samples
Construct  90%, 95%, and 99% confidence intervals for the population mean, and state the practical and probabilistic...
Construct  90%, 95%, and 99% confidence intervals for the population mean, and state the practical and probabilistic interpretations of each. Indicate which interpretation you think would be more appropriate to use. Explain why the three intervals that you construct are not of equal width. Indicate which of the three intervals you would prefer to use as an estimate of the population mean, and state the reason for your choice. In a length of hospitalization study conducted by several cooperating hospitals, a...
Construct 90%, 95%, and 99% confidence intervals to estimate μ from the following data. State the...
Construct 90%, 95%, and 99% confidence intervals to estimate μ from the following data. State the point estimate. Assume the data come from a normally distributed population. 12.9 11.6 11.9 12.2 12.5 11.4 12.0 11.7 11.8 12.9 (Round the intermediate values to 4 decimal places. Round your answers to 2 decimal places.) 90% confidence interval: ?≤ μ ?≤ 95% confidence interval: ?≤ μ? ≤ 99% confidence interval:? ≤ μ ?≤ The point estimate is?
Construct 90%, 95%, and 99% confidence intervals to estimate μ from the following data. State the...
Construct 90%, 95%, and 99% confidence intervals to estimate μ from the following data. State the point estimate. Assume the data come from a normally distributed population. 13.2 11.6 11.9 12.5 12.5 11.4 12.0 11.7 11.8 13.2 Appendix A Statistical Tables (Round the intermediate values to 4 decimal places. Round your answers to 2 decimal places.) 90% confidence interval: enter the lower limit of the 90% confidence interval  ≤ μ ≤ enter the upper limit of the 90% confidence interval 95%...
Construct 90%, 95%, and 99% confidence intervals to estimate μ from the following data. State the...
Construct 90%, 95%, and 99% confidence intervals to estimate μ from the following data. State the point estimate. Assume the data come from a normally distributed population. 11.9 11.6 11.9 13.0 12.5 11.4 12.0 11.7 11.8 11.9 Appendix A Statistical Tables (Round the intermediate values to 4 decimal places. Round your answers to 2 decimal places.) 90% confidence interval: enter the lower limit of the 90% confidence interval  ≤ μ ≤ enter the upper limit of the 90% confidence interval 95%...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT