Please answer asap Question 13 of 18A point estimate is defined as:O A single value that is the best estimate of an unknown population parameterO A single value that is the best estimate of an unknown sample statisticO The true value of the population meanO Estimate of the sample sizeSAVE PROGRESSSUMacBook AirDIIF9F10F6F7F8F5&(5789YP Question 15 of 18A 95% confidence interval for a population mean is determined to be 34.5 to 38.7. If theconfidence level is now changed to 90%, the confidence interval for ubecomes widerO does not changeO becomes narrowerbecomes 5% narrower->SAVE PROGRESSSUBMIT ASSIMacBook AirDIIDDF10F11F9F6F7F5*&5689{U

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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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question 17 A smart phone manufacturer is interested in constructing a 95% confidence interval for the proportion of smart phones that break before the warranty expires. 81 of the 1662 randomly selected smart phones broke before the warranty expired. Round answers to 4 decimal places where possible. a. With 95% confidence the proportion of all smart phones that break before the warranty expires is between____ and _____. b. If many groups of 1662 randomly selected smart phones are selected, then a different confidence interval would be produced for each group. About _____ percent of these confidence intervals will contain the true population proportion of all smart phones that break before the warranty expires and about ____ percent will not contain the true population proportion. please solve blank
QUESTION 4 Copy of The GPAs of nursing students (p1) were compared to GPAs of student-athletes (p2) were compared. Of a sample of 400 randomly and independently selected nursing students, 75% were placed on honor roll. Of a sample of 100 athletes, 80% of the students were placed on honor roll. Calculated the UPPER bound of the 95% confidence interval for the two samples. Round to the nearest hundredth.
Question 36 According to statistics reported on CNBC, a surprising number of moter vehicles are not covered by insurance. Sample reults, consistent with the CNBC report, showed 46 of 200 vehicles were not covered by insurance. Part A What is the point estimate of the proportion of vehicles not covered by insruance? Part B Develop a 95% confidence interval for the population proportion.
QUESTION 3 The GPAs of nursing students (p1) were compared to GPAs of student-athletes (p2) were compared. Of a sample of 400 randomly and independently selected nursing students, 75% were placed on honor roll. Of a sample of 100 athletes, 80% of the students were placed on honor roll. Calculated the UPPER bound of the 95% confidence interval for the two samples. Round to the nearest hundredth.
Question 2: The GPAs of nursing students (p1) were compared to GPAs of student-athletes (p2) were compared. Of a sample of 400 randomly and independently selected nursing students, 75% were placed on honor roll. Of a sample of 100 athletes, 80% of the students were placed on honor roll. Calculated the LOWER bound of the 95% confidence interval for the two samples. Round to the nearest hundredth.
Question 1 In a random sample of forty-eight 200-metre swims has a mean time of 3.12 minutes and a standard deviation of 0.09 minutes. (a) Construct the 89% confidence interval for the population mean time. (b) If all the other quantities remain the same, how does the indicated change affect the width of the confidence interval? (i) Increase in the sample size (ii) Increase in the level of confidence.
question 3: A simple random sample of 10 items resulted in a sample mean of 30 . The population standard deviation is 10 . a. Compute the 95 % confidence interval for the population mean. Round your answers to one decimal place.( , ) , ( , ) b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95 % confidence interval for the population mean. Round your answers to two decimal places. ( , ) , ( ,) question 6 Wall Street Journal reported on several studies that show massage therapy has a variety of health benefits and it is not too expensive. A sample of 11 typical one-hour massage therapy sessions showed an average charge of 58 . The population standard deviation for a one-hour session is $5.35 b. Using 95% confidence, what is the margin of error (to 2 decimals)? c. Using 99% confidence, what is the margin of error (to 2 decimals)
Question 8: calculate in 95% confidence interval for the blood pressure range of any individual who is prescribed the medicine.
QUESTION 11 In 2005, Health Canada claimed that 16.8% of Canadian adults are obese. A researcher wanted to check whether this percentage has increased in 2009. He randomly selected 175 Canadian adults and found 29 of them are obese. Write down lower value for 88% confidence interval for percentage of Canadian adults with obesity. Example, if the CI is (1.2,1.8), then the lower value of this CI is 1.2. Give your answer to 3 decimal places.
Question 4: A survey was administrated to determine the proportion of workers who reject relocation offers to be an administrator for family considerations. In the survey 423 people out of 672 rejected relocation offers due to family considerations. Use this information to construct a 95% confidence interval for the proportion of the population that will reject relocation offers due to family considerations.
QUESTION 11 You may need to use the appropriate appendix table or technology to answer this question. Fewer young people are driving. In year A, 62.9% of people under 20 years old who were eligible had a driver's license. Twenty years later in year B that percentage had dropped to 49.7%. Suppose these results are based on a random sample of 1,700 people under 20 years old who were eligible to have a driver's license in year A and again in year B. (a) At 95% confidence, what is the margin of error of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answer to four decimal places.) At 95% confidence, what is the interval estimate of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answers to four decimal places.) to (b) At 95% confidence, what is the margin of error of the number of eligible people under 20 years old who had a driver's license in year B? (Round your answer to four…
Question 1: The GPAs of nursing students (p1) were compared to GPAs of student-athletes (p2) were compared. Of a sample of 400 randomly and independently selected nursing students, 75% were placed on honor roll. Of a sample of 100 athletes, 80% of the students were placed on honor roll. Calculated the LOWER bound of the 95% confidence interval for the two samples. Round to the nearest hundredth. Question 2: The GPAs of nursing students (p1) were compared to GPAs of student-athletes (p2) were compared. Of a sample of 400 randomly and independently selected nursing students, 75% were placed on honor roll. Of a sample of 100 athletes, 80% of the students were placed on honor roll. Calculated the UPPER bound of the 95% confidence interval for the two samples. Round to the nearest hundredth. Question 3: Copy of The GPAs of nursing students (p1) were compared to GPAs of student-athletes (p2) were compared. Of a sample of 400 randomly and independently selected nursing…

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A point estimate is defined as: O A single value that is the best estimate of an unknown population parameter O A single value that is the best estimate of an unknown sample statistic O The true value of the population mean O Estimate of the sample size