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During World War II, 12,000 able-bodied male undergraduates at the university of Illinois participated in required physical training. Each Student ran a timed mile. Their times followed the normal distribution with mean 7.11 minutes and a standard deviation 0.74 minute. An SRS of 100 of these students has mean time 7.15 minutes. A second SRS of size 100 has a mean 6.97 minutes. After many SRS, the many values of the sample mean follow the Normal distribution with mean 7.11 minutes and standard deviation 0.074 minute.
a) What is the population? What values does the population distribution describe? What is this distribution?
b) What values does the sampling distribution of x describe? What is the sampling distribution?
Assume rf is 5% and rm is 10%. According to the SML and CAPM, an asset with a beta of -2.0 has a required return of negative 5%[=5-2(10-5)]. Can this be possoble?
A busy landscaping supplies company sells wood chips for garden mulch. The mulch is sold by the cubic metre and delivered to households in a small truck.
Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb
A Pew research poll was conducted to investigate opinions about global warming. The respondents who answered yes when asked if there is solid evidence that the earth is getting warmer were then asked to select a cause of global warming.
Nationwide, the average waiting time until a electric utility customer service representative answers a call is 210 seconds. The Gigantic Kilowatt Energy Company randomly sampled 30 calls and found that, on average, they were answered in 183 secon..
Using the raw measurement data presented below, calculate the t value for independent groups to determine whether or not there exists a statistically significant difference between the salaries of female and male human resource managers.
What was the probability that a student worked a part time job or made the Dean's list. Interpret the results.
Normal adult Mean Temperature is 98.2 and standard deviant is 0.62 with normal distribution. If 16 people are randomly selected determine the probability that their mean body temp is below 98.5 degrees.
Historically the average age of European soccer players is reported as 26 years with a standard deviation of 4 years. A random sample of 81 European professional soccer players has an average age of 27 years.
The following data resulted from an experiment to study the effects of leaf removal on the ability of fruit of a certain type to mature:
Suppose you are on a test and are asked to determine whether the given experiment is binomial, Poisson, or neither. What are you going to think about to determine which test to use. Do you have a checklist? How would you approach this problem?
A random sample of 17 wolf litters in Ontario, Canada gave an average of x1= 4.9 wolf pups per litter, with estimated sample standard deviation s1 - 1.0.
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