Homework Help for Statistics
Statistics is an area of Mathematics that uses large amounts of numerical data to make inferences based on probabilities.
Which of the following concepts implies that sustainable development should take a holistic approach towards notions of progress and give equal importance to non-economic aspects of wellbeing?
(A) Gross Domestic Product
(B) Gross National Product
(C) Gross National Happiness
(D) Net National Product
You have a data set of 4096 daily observations and would like to estimate the Hurst exponent for that data like we discussed in the lectures. In the first iteration, you want to operate with two data samples consisting of 2048 non-overlapping observations and in the last iteration you want to have 1024 data samples consisting of 4 non-overlapping observations. How many data clusters do you have in total? You perform the following log-log regression: In(R/S)k = In(C) + HIn(k) + u. The estimated Hurst exponent is 0.72. If you implement the following hypothesis test,
Ho: H = 0.50 versus H1: H > 0.50,
what is your dependency structure under the null hypothesis? What is the corresponding reference distribution under the null hypothesis? Assuming that you apply a standard significance level of 5%, what is the critical value? Assume now that you run the test and your
estimated test statistic has a value of ^ = 1.81. What do you conclude concerning the
dependency structure of your data?
7) The time it takes for a statistics professor to grade an exam is normally distributed with a mean of 9.7 minutes and a standard devation of 1.9 minutes. There are 50 students in the professor's class. What is the probabilty that more than 8 hours are needed to grade all of the exams? (Report your answer to 4 decimal places.)
8) The daily productivity of a factory worker is normally distributed with a mean of 100 units and a standard deviation of 22 units. What is the probability that the average number of units produced in one day by 9 randomly selected workers is less than 90 units? (Report your answer to 4 decimal places.)
9) A coffee shop in a large office building provides coffee for the occupants in the building. The coffee shop manager has determined that the mean number of cups of coffee an employee consumes in a day is 2 with a standard deviation of 0.9. A new business that has located in the building intends to have 150 new employees. What is the probability that the new employees will consume more than 285 cups of coffee per day? (Report your answer to 4 decimal places.)
10) The number of hamburgers consumed per month by undergraduate students is normally distributed with a mean of 8.5 and a standard deviation of 1.75. What is the probability that in a random sample of 28 students more than 231 hamburgers are consumed? (report your answer as a decimal to 4 decimal places)
11) A pharmaceutical manufacturer of aspirin claims that the proportion of headache sufferers who get relieve with two aspirins is 66%. What is the probability that in a random sample of 250 headache sufferers, more than 70% obtain relief? (Report your answer to 4 decimal places.)12) Using the aspirin problem above, what if the probability if the sample is increased to 1000? (Report your answer to 4 decimal places.)
please explain how to do this in excel along with the answers.
Suppose a group is interested in determining whether teenagers obtain their drivers licenses at approximately the same average age across the country. Suppose that the following data are randomly collected from five teenagers in each region of the country. The numbers represent the age at which teenagers obtained their drivers licenses. Use a level of significance of 0.10.
Northeast South West Central
16.3 16.9 16.4 16.2
16.1 16.5 16.5 16.6
16.4 16.4 23.0 16.5
16.5 16.2 20.2 16.4
What test are you going to run?
Discuss with your classmates how the material you are reading and learning about regarding mortgages and taxes might help you in your daily life and/or in the field in which you are seeking employment or are currently employed in. If you might be in the market for a home, how might this information help you make an informed decision? You may, but are not required to, use information relating to your own personal mortgages or town taxes. Do not divulge any personal information that would be an invasion of your privacy. There are no individual questions from the text for Discussion this week.