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Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students. The result for University X was a mean of 5 hours and an estimated population variance of 2 hours; for University Y, M = 4, S2 = 1.5; and for University Z, M = 6, S2 = 2.5. What should you conclude? Use the .05 level. (a) Use the steps of hypothesis testing, (b) figure the effect size for the study; and (c) explain your answers to parts (a) and (b) to someone who has never had a course in statistics.
What is the inverse Laplace transform of (s+1)/((s+4)(s+5)(s+3))? Show work using partial fraction expansion and using Heavside method.
If 9 less than the product of a number and -4 is greater than 7, which of the following could be that number?
In the class, there are 12 freshmen, of whom 8 are males and 15 sophomores, of whom 5 are females. If one student is selected at random, what is the probability of selecting a freshman or a female?
write the related multiplication or division sentence. draw a quik picture that shows the sentence.
If her company manufactures 7 types of pain relievers, 3 types of antidepressants, 6 types of allergy medicine, and 2 types of cholesterol medicine, how many different sales portfolios are poosible?
Senior Management at Esil University believes that decreases in the number of undergraduate applications that they have experienced are directly related to tuition increases.
2 mechanics worked on a car. The first mechanic worked for 10 hours and the second mechanic worked for 15 hours. Together they charged a total of 1850 . What was the rate charged per hour by each mechanic if the sum of the 2 rates was 145 per hour..
Holiday Inn wants to develop a 97% interval for the mean number of rooms occupied each night at its locations around the nation. How many nights must be included in the sample if an error of 50 rooms can be tolerated and a pilot sample reveals s =..
how to verify a process is gaussian process mathematically.
part of a $2900 investment earned interest at a rate of 6%, and the rest earned interest at a rate of 2%. The combined interest at the end of the year was $160. How much was invested at each rate?
What are the domain, range and intercepts of this one? I am totally confused about this graph. Are there even any x and y intercepts?
For the function: f(x)=(x^2/4)+e^(-x^2), sketch a graph of the function. Calculate the first and second derivatives, and use these answers to approximate the locations of the local maximum, minima, and the inflection points.
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