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You are conducting a study on what socio-demographic factors could be behind the behavioral problems of students. You are looking at how many times a student was sent to detention. You have information on race, gender, household median income, single parent household, and whether or not the child plays sports through school or is involved in other after-class activities or clubs at the school. You run a regression. You get an F statistic of 0.001 and an R2 of 0.381. Interpret these results in terms of goodness of fit of your model. Assuming that you have access to more indicators, would you use them to improve the model? How would you know if there was an improvement if you tested to see if there is a need to use those additional indicators?
In 2004, Newsmonth reported that 60% of young children have blood lead levels that could impair their neurological development. Assuming that a class in a school is a random sample from the population of all children at risk
Computing the probability value using normal distribution - find the normal distribution
The design tolerance thickness for an automotive part is 55 mm to 65 mm. If the process mean thickness is 61 with a standard deviation of 2.3 mm, then what percentage of the sheets will be acceptable? (i.e. What percentage will fall within the des..
Determine 95% confidence interval evaluate for average number of years served by all Supreme Court justices?
According to the U.S. Census Bureau, the mean household income in the United States in 2000 was $57,045 and the median household income was $42,148.
Determine marginal probability distributions of X and Y . Compute conditional probability P ( Y = 2 | X = 1)
Develop the opportunitiy loss table and compute the expected opportunity loss for each product. Determine how much the firm would be willing to pay to a market research firm to gain better information about future market conditions.
A club has twenty members aged twenty. What are the chances that at least one fourth of them will die before their 65th birthdays?
What is the likelihood the sample mean is greater than $22.50 but less than $25.00?
The sample mean of the sampling distribution of a statistic is 6 and the standard error of the statistic is 1.03. What is the probability that xbar > 7.52?
There are 4 entrances to a building in Philadelphia. The bldg maintenance super would like to know if the entrances are equally utilized. To investigate, 400 people were observed entering the building.
Repeat this process 10 times or you can draw 10 samples simultaneously using StatTools. Make a histogram of the 10 values of sample means. You are constructing the sampling distribution of sample means. What is the center of your histogram?
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