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Question 1 According to the 2011 National Occupant Protection Use Survey, only 84% of drivers wear seat belts. Calculate the probabilities that out of 4 randomly selected drivers, a) Only one of the drivers is wearing a seatbelt b) Half of the drivers are wearing seatbelts c) All of the drivers are wearing seatbelts Question 2 Find the proportion under a standardized normal curve in the following cases: a) Less than -2.50 b) Greater than 1.60 c) Between -1.96 and 1.96 d) Less than -1.96 or greater than 1.9
Describe a circumstance when the mean is a very useful measure and a circumstance when it is misleading
What does it mean for a sample to have a standard deviation of 0? Describe the scores in such a sample.
Test the hypothesis that there is not relationship between the proneness to use excessive force score and the force score for officers trained at Academy A.
Write your own newspaper article for the study with at least one appropriate table or graph.
Calculate the mean yearly value using the average gas prices by month found in the Final Project Data Set. What is the slope of the linear regression line and what is the Y-intercept of the linear regression line
Determine the number of stores that must be sampled in order to estimate the true proportion to within 0.05 with 95% confidence using the large-sample method.
Calculate the variance-covariance matrix of the OLS estimator of β1.β2 and β3 and verify that:
What is the correlation between pre-test scores and post-test scores? Assuming the obvious directional hypothesis (i.e., that those who score highly at pre-test tend to score highly at post-test), is the correlation statistically significant?
A manufacturing company produces steel housing for electrical equipment
Given a business situation word problem or case study, such as defective items or waiting lines, use discrete probability concepts to determine a course of action
Variable regression model - matrix of independent variables- multiple regression and, in particular.
How do small companies compare to the major competitor and Has satisfaction with the manufacturer changed since the change in company ownership?
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