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1. According to the latest poll, 750 adult respondents believe in global warming. Construct a 95% confidence interval estimate of the proportion of adults who believe in global warming. Round your lower bound and upper bound of the confidence interval to 3 decimal places.
2. Based on the performance of all individuals who took the GRE Verbal Reasoning Exam for the last three academic years, test takers had a mean score of 150 and a standard deviation of 8.5
a. For a sample size of 100, state the standard deviation of the sample mean (standard error of the mean) to 3 decimal places.
b. Find the probability that the sample mean scores is more than 155 (rounded to 3 decimal places)
3. Does an exercise program lower cholesterol? 100 adults were given a weekly exercise program. Cholesterol levels were measured before and after this treatment. the changes in their LDL cholesterol (mg/dL) have a mean of 6 and a standard deviation of 4.
Construct a 90% interval estimate of the mean change in LDL cholesterol after treatment. Round lower and upper bound of the confidence interval to 2 decimal places. Show your work.
suppose the sample size from the normal population is 11. also assume that the population standard deviation is
The projected probability of increase in online holiday sales from 2004 to 2005 is 95% in the United States, 90% in Australia, and 85% in Japan.
the quarterly returns of a group of 59 mutual fund with the mean of 3.6 and standard deviation of 5.3 can be modeled by
Find the gross earnings of a salesperson who has total sales of $23,600. (No commission is paid on the first $15,000 of sales.)
What is the stock's expected return? What is the stock's standard deviation? What is the stock's coefficient of variation?
Your firm has classified orders as either large or small in dollar amount and as either light or heavy in shipping weight. In the recent past, 28% of orders have been large dollar amounts
In this assignment, you will explore social media and marketing technology in an essay. In your essay, choose a brand (or product) that relies heavily on social media or technology to market their product. Examples would be Netflix, Uber, or Coca-..
questiona jonka tries to connect to his internet service provider. the probability that he connects on any single
A total of 633 listeners call in. The station calculates the 95% confidence interval for the average fee desired by city residents to be $0.83 to $1.28. Is this result trustworthy? Explain your answer.
Find the equation of the regression line for the given data. Then construct a scatter plot of the data and draw the regression line.
Develop three regression models to predict the selling price based upon each of the other factors individually. Which of these is best?
Assuming this is literally true, how can it be explained? What facts / statistics would you need to know to expose this misleading claim?
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