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4. Find the average retail gasoline price for regular grade gasoline sold in the United States on 5/11/2015 from the Department of Energy website at https://www.eia.doe.gov/oil_gas/petroleum/data_publications/wrgp/mogas_home_page.html.Assume the obtained price is the population mean price and the standard deviation is $0.63. Suppose a random sample of 55 gasoline stations will be selected, and a sample mean price per gallon will be computed for this sample data.a. What are the mean and the standard deviation of the sample mean? What is the probability distribution for the sample mean? Describe this sampling distribution and draw the graph of this probability distribution with its mean and standard deviation.b. What is the probability that the simple random sample will provide a sample mean more than $2.5?c. What is the probability that the simple random sample will provide a sample mean less than $2.8?5. Consider a population with a known population standard deviation of 13.2. In order to compute an interval estimate for the population mean, a sample of 64 observations is drawn. The sample mean is 37.6. a. Compute the 90% confidence interval.b. Compute the 95% confidence interval. 6. See Exercise 7.13 on page 299 of your textbook.A personnel manager has found that historically the scores on aptitude tests given to applicants for entry-level positions follow a normal distribution with a standard deviation of 32.4 points. A random sample of nine test scores from the current group of applicants had a mean score of 187.9 points. a. Find an 85% confidence interval for the population mean score of the current group of applicants. b. Find an 95% confidence interval for the population mean score of the current group of applicants.
find the correlation between anca and the clinical manifestations k l c gi msk n ent s. nbspwe want to find out which
The following table gives the data for per capita income in thousands of US dollars with the percentage of the labor force in Agriculture and the average years of schooling of the population over 25 years of age for 15 developed countries in 20..
1. Does Steve need additional information from Iverstine and Walker? 1. Does Steve need additional information from Iverstine and Walker?
The company SlimDown makes weight loss products.
What is the reality of the use of e-learning from the perspective of students of the First Level in the Department of Management Information Systems at University of Hail
To test the hypothesis that there is no association between use of postmenopausal hormones and risk of MI, chi-square statistics need to be calculated.
What is a 95% confidence interval
Know the proper format for a Null Hypothesis. Know the proper format for an Alternative Hypothesis. Know how to state a Null and Alternative Hypothesis for business situations. Know the definition of a Type I error. Know the definition of a Typ..
Calculate the expected value, variance, and standard deviation of the total income
The results of Computerworld's annual job satisfaction survey showed that 28% of IS managers were very satisfied with their job. 46%= somewhat satisfied, 12% neither satisfied or dissatisfied, 10% dissatisfied, and 4% very dissatisfied.
Conduct an ANOVA
quantitative analysis for decision making course assignment. 1- graphical solutions in linear programming have limited
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