Homework Answers
My dear student im allow to solve one question at a time so i
solved the first question only thanku.![n = 35, X =28, 0:6,(=97. Critical lealus, R-1-0.976 0.03 9/2= 0.015 Zal2 = 20.015 = + [2.170) (using z table] 97% Confidence](http://img.homeworklib.com/questions/775f6c70-9355-11eb-9118-357a984869d3.png?x-oss-process=image/resize,w_560)
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QUESTIONS 1 points Save Ans To determine the average weight of carry-on luggage by passengers in...
In order to determine the average weight of carry-on luggage by passengers on a particular airplane,...
In order to determine the average weight of carry-on luggage by passengers on a particular airplane, a sample of 22 pieces of carry-on luggage was weighed. The average weight was 9 kg. It is known that the weight of carry-on luggage is normally distributed and that historical data has shown the standard deviation is 3.45 kg. Determine the critical value for the test statistic (z or t) needed to build an 80% confidence interval for the mean. State the positive...
The luggage handing branch at the airport wants to estimate the mean weight among all checked...
The luggage handing branch at the airport wants to estimate the mean weight among all checked suitcases. A random sample of 47 checked suitcases were carefully weighed (to the nearest pound). The sample results found a mean of 40.6 pounds and a standard deviation of 9.5 pounds. a. Estimate with 90% confidence the mean weight of all checked luggage. (18) b. Explain fully what is meant when you say, "you have 90% confidence" in your interval in part A.
Question 9 (2 points) Most major airlines allow passengers to carry two pieces of luggage onto...
Question 9 (2 points) Most major airlines allow passengers to carry two pieces of luggage onto the plane. One regional airline is considering changing its policy to allow only one carry-on per passenger. A random sample of 40 passengers was selected. Out of the 40 passengers, 8 had more than one bag. Construct a 95% confidence interval estimate for the percentage of the traveling population that had more than one bag. O 7.21% - 32.79% 7.60% - 32.40% 19.22% -...
Question of 6 Question 1 5 points Save Answer You want to estimate the mean salary...
Question of 6 Question 1 5 points Save Answer You want to estimate the mean salary of people in a country, so you take a random sample of 121 people from around the country. The sample had an average salary of 545000 dollars with population standard deviation of 50000 dollars Calculate the Upper Limit of the confidence Interval for the mean salary of the people in the country Reminders You only need to calculate the Upper Limit of the confidence...
random sample of 64 students at a university showed an average age of 25 years and...
random sample of 64 students at a university showed an average age of 25 years and a sample standard deviation of 2 years. The 95% confidence interval for the true average age of all students in the university is ____________ Select one: a. 24.5 to 25.4 b. 20.5 to 29.5. c. 23.0 to 27.0 d. 20.0 to 30.0
Suppose a university wishes to estimate the average weight of their undergraduate male students. A random...
Suppose a university wishes to estimate the average weight of their undergraduate male students. A random sample of 200 undergraduate male students at this university are sampled. It is found that the sample mean weight is 83.3 kg, with a corresponding 95% confidence interval for mu of (81.3, 85.3). Of the following options, which one is the most appropriate interpretation of that interval? We can be 95% confident that the sample mean weight of the 200 undergraduate male students in...
3 Suppose a university wishes to estimate the average weight of their undergraduate male students. A...
3
Suppose a university wishes to estimate the average weight of their undergraduate male students. A random sample of 200 undergraduate male students at this university are sampled. It is found that the sample mean weight is 83.3 kg, with a corresponding 95% confidence interval for mu of (81.3, 85.3). Of the following options, which one is the most appropriate interpretation of that interval? 95% of all male undergraduate students at this university weigh between 81.3 and 85.3 kilograms. In...
The union for a particular industry has determined that the standard deviation of the daily wages...
The union for a particular industry has determined that the standard deviation of the daily wages of its workers is $21. A random sample of 50 workers in this industry has a mean daily wage of $118. Find a 90% confidence interval for the true mean daily wage of all union workers in the industry. Then complete the table below Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. What is the...
In a random sample of 30 young bears, the average weight at the age of breeding...
In a random sample of 30 young bears, the average weight at the age of breeding is 312 pounds. Assuming the population ages are normally distributed with a population standard deviation is 30 pounds, use the Empirical Rule to construct a 68% confidence interval for the population average of young bears at the age of breeding. Do not round intermediate calculations. Round only the final answer to the nearest pound. Remember to enter the smaller value first, then the larger...
random sample of 28 students at the university showed an average age of 25 years and...
random sample of 28 students at the university showed an average age of 25 years and a sample standard deviation of 2 years. Calculate the margin of error for a confidence interval for age at the 98% level of confidence O 1.235 O : 1.645 ○ :0.945 O 0.888
Question 9 (2 points) Most major airlines allow passengers to carry two pieces of luggage onto the plane. One regional airline is considering changing its policy to allow only one carry-on per passenger. A random sample of 40 passengers was selected. Out of the 40 passengers, 8 had more than one bag. Construct a 95% confidence interval estimate for the percentage of the traveling population that had more than one bag. O 7.21% - 32.79% 7.60% - 32.40% 19.22% -...
Question of 6 Question 1 5 points Save Answer You want to estimate the mean salary of people in a country, so you take a random sample of 121 people from around the country. The sample had an average salary of 545000 dollars with population standard deviation of 50000 dollars Calculate the Upper Limit of the confidence Interval for the mean salary of the people in the country Reminders You only need to calculate the Upper Limit of the confidence...
Suppose a university wishes to estimate the average weight of their undergraduate male students. A random sample of 200 undergraduate male students at this university are sampled. It is found that the sample mean weight is 83.3 kg, with a corresponding 95% confidence interval for mu of (81.3, 85.3). Of the following options, which one is the most appropriate interpretation of that interval? We can be 95% confident that the sample mean weight of the 200 undergraduate male students in...
3
Suppose a university wishes to estimate the average weight of their undergraduate male students. A random sample of 200 undergraduate male students at this university are sampled. It is found that the sample mean weight is 83.3 kg, with a corresponding 95% confidence interval for mu of (81.3, 85.3). Of the following options, which one is the most appropriate interpretation of that interval? 95% of all male undergraduate students at this university weigh between 81.3 and 85.3 kilograms. In...
The union for a particular industry has determined that the standard deviation of the daily wages of its workers is $21. A random sample of 50 workers in this industry has a mean daily wage of $118. Find a 90% confidence interval for the true mean daily wage of all union workers in the industry. Then complete the table below Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. What is the...
random sample of 28 students at the university showed an average age of 25 years and a sample standard deviation of 2 years. Calculate the margin of error for a confidence interval for age at the 98% level of confidence O 1.235 O : 1.645 ○ :0.945 O 0.888
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