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1.) The mean number of English courses taken in a two-year time period by male and female college students is believed to be about the same. An experiment is conducted and data are collected from 29 males and 16 females. The males took an average of three English courses with a standard deviation of 0.8. The females took an average of four English courses with a standard deviation of 1.0. Are the means statistically the same? 2.) A student at a four-year college claims that mean enrollment at four-year colleges is higher than at two-year colleges in the United States. Two surveys are conducted. Of the 35 two-year colleges surveyed, the mean enrollment was 5,068 with a standard deviation of 4,777. Of the 35 four-year colleges surveyed, the mean enrollment was 5,466 with a standard deviation of 8,191. I need these to be solved showing all the work, no calculators "These are to be complete Hypothesis test starting with Ho & Ha and ending with a decision based on the rejection region or the p-value." "Find Z (crit) for two tail test withα =.05"
What is the probability of winning a prize in an office sweep
Descriptive statistics and inferential statistics
Select two variables that might be related, such as the number of hours a student watches TV and the number of credits the student has, or a baseball player's salary and the number of home runs per year the player scores. You will need to get..
The length of time between breakdowns of an essential piece of equipment is an important factor in deciding on the amount of auxiliary equipment needed to assure continuous service. A machine room foreman believes the time between breakdowns of a par..
Can the final study be generalized to the entire population of high-risk cardiac surgery - Calculate the 95% confidence interval for the mean age of the Aprotinin group.
Identify a cost reduction or performance improvement opportunity in a real business (large or small) or in any organization to apply one of the techniques discussed in the course. Collect real data and be ready to defend your assumptions ab..
What are the changes social media has brought to consumers in different stages of their decision-making - how many social media platforms are used by online marketers in Saudi Arabia and what are their effects?
A study of 37 graduates of four-year colleges revealed the mean amount owed by a student in student loans was $16,381. The standard deviation of the sample was $1,352. Construct and explain a 90% confidence interval estimate of the population mean am..
Assume Z is a random variable with a standard normal distribution ( the is, a mean =0 and a standard deviation of 1). What is P(Z -0.5) ?
5. A laboratory weights filters from a coal mine to measure the amount of dust in the mine atmosphere. Repeated measurements of the weight of dust on the same filter has a standard deviation of σ = 0.08 milligram (mg) and mean 123 mg.
According to a report released by CIBC entitled "Women Entrepreneurs: Leading the Charge," the average age for Canadian businesswomen in 2008 was 41
The problem of passenger congestion prompted a large international airport to install a monorail connecting its main terminal to the three concourses, A, B, and C. The engineers designed the nomorail so that the amount of time a passenger at concours..
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