A medical research team is interested in estimating the mean systolic blood pressureamong teenagers. From previous study, they do know that the population standarddeviation is 10. How many teenagers should be sampled so that a 90% confidenceinterval will have a margin of error of 5?(Hint: Certainly, the answer should present an integer number.)

Answered: Image /qna-images/answer/c9a0a62d-2489-49b9-bdd9-893aed123880.jpg

Answered: A medical research team is interested…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you are not sure how many citizens should be included in the sample. If you want your sample estimate to be within 4 years of the actual mean with a confidence level of 98%, how many citizens should be included in your sample? Assume that the standard deviation of the ages of all the citizens in this community is 24 years.Sample Size:
You measure 48 backpacks' weights, and find they have a mean weight of 67 ounces. Assume the population standard deviation is 2 ounces. Based on this, what is the maximal margin of error associated with a 95% confidence interval for the true population mean backpack weight. Give your answer as a decimal, to two places H ounces
You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you are not sure how many citizens should be included in the sample. If you want your sample estimate to be within 4 years of the actual mean with a confidence level of 94%, how many citizens should be included in your sample? Assume that the standard deviation of the ages of all the citizens in this community is 25 years. Type your answer in the following format: [xxx,xxx] with no space inside the brackets. An alternative is to type a single number (not in brackets) - if the system marks you incorrect, bear in mind that I do check all answers. Sample Size:
You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you are not sure how many citizens should be included in the sample. If you want your sample estimate to be within 4 years of the actual mean with a confidence level of 97%, how many citizens should be included in your sample? Assume that the standard deviation of the ages of all the citizens in this community is 25 years. Sample Size: Submit Question
You may need to use the appropriate appendix table or technology to answer this question. A simple random sample of 80 items resulted in a sample mean of 90. The population standard deviation is ? = 5. Compute the 99.5% confidence interval for the population mean. (Round your answers to two decimal places.)
You measure 25 backpacks' weights, and find they have a mean weight of 63 ounces. Assume the population standard deviation is 9.2 ounces. Based on this, what is the maximal margin of error associated with a 99% confidence interval for the true population mean backpack weight. Give your answer as a decimal, to two places ounces
You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you are not sure how many citizens should be included in the sample. If you want your sample estimate to be within 5 years of the actual mean with a confidence level of 98%, how many citizens should be included in your sample? Assume that the standard deviation of the ages of all the citizens in this community is 23 years.Sample Size:
A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. The mean is found to be 7.8 reproductions and the population standard deviation is known to be 2.2 If a sample of 697 was used for the study, construct the 85% confidence interval for the true mean number of reproductions per hour for the bacteria. Round your answers to one decimal place
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