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1. A random sample of 20 students yielded a mean of x¯ = 72 and a variance of s2 = 16 for scores on a college placement test in mathematics. Assuming the scores to be normally distributed, construct a 98% con- ?dence interval for s2.
2. that s2= 1 is valid. Assume the population of battery lives to be approximately normally distributed.
A gallop poll that was based on telephone interviews conducted April 9-12, 2012, using a random sample of 1016 adults aged 18 and older, living in all 50 US states and the District of Columbia, indicated that 29% of Americans spent more money in rece..
Formulate this as a game on normalform. Find the Bi-matrix. Do there exists a Nash equilibrium in pure strategies of this game? What is a mixed strategi of player 1 in this game?
(a) Use the least squares regression to calculate the trendline equation for advertising expenditure in the financial services sector. (b) Predict the level of advertising expenditure for the sector for 2012. (c) Use Excel to plot a line graph of a..
When 338 college students are randomly selected and surveyed, it is found that 109 own a car. Find a 99% confidence for the true proportion of all college students who own a car.
Assess the use of qualitative data to support business decision making. Consider different types of qualitative data collection and analysis methods and the ways in which they can support business decision making and strategies.
Percentage distributions are useful in comparing two frequency distributions having different total frequencies. Construct percentage distributions from the following two frequency distributions and determine whether the distributions of daily ab..
describe a fictional two-group experiment that could be tested with an independent t-test but violates the assumption
Develop a spreadsheet model that could be used to assist a user with retirement planning.
Question 1 A The data set oducat ion. dt a contains data on the years of education of a random sample of 718 Americans. as well as the same information for both of their parents. It is likely that parents' achievements have some predictive power f..
Of the next 15 people that invest in this project, what is the probability that 5 or less people will result an annual net cash flow of at least $100,000.
The Web page is accessible at: http://libguides.lib.fit.edu/InformationTechnology. (http://lib.fit.edu) has links to journals and databases. Go to the library home page and click on the "A to Z" journal list (on the left). Select a database or jour..
a. Formulate hypotheses that can be used to determine whether the mean price in New York City differs from $5600. b. A sample of 25 New York City contacts provided the prices shown in the attached file named diamonds. What is the p-value? c. at a = ...
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