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Q1) Voting behaviour is examined for random sample of population, by researchers who are interested in relationship between voting behaviour and many different demographic variables. Members of the sample are asked the following:
i) Their gender (male or female),
ii) Their income bracket (in quartiles)
iii) Their ethnic origin (recorded as Latin American, European, African, East Asian, Middle Eastern, South Asian, or Aboriginal American).
If these answers were combined into single statistic, how could we explain sample space? Mention how many elements are in sample space?
Determine a 95% confidence interval for mean amount spent by all Internet shoppers.
Assess the model fit for the multiple linear regression model using appropriate statistics and graphics.
Find out the slope, b, and the intercept, a, for the least-squares line. Write the equation of the least squares line.
Arbitrarily choose someone from sample. Determine the probability that they are Jewish and Democrat?
What type of error has possibly been committed? Explain the error in ordinary language.
If the variability of the filling machine is reduced to 0.025 ounce, verify that this will lower the required average amount of coffee to 4.050 ounces and yet keep 98 percent of the jars above 4 ounces.
Find the probability that the number of who consider themselves basketball fans is :
A major study examined the relationship between cause of death (heart attack, cancer, stroke, accident, etc.) and age. A good way to graphically represent the relationship is with
Among 500 freshmen pursuing a business degree at a university, 347 are enrolled in an economics course, 204 are enrolled in a mathematics course, and 160 are enrolled in both an economics and a mathematics course.
What is the probability of flipping a coin 6 times and getting 4 or more heads?
Suppose that sales of lemonade and sales of brownies are independent, determine standard deviation in his revenue.
Assume that the measurements came from a normal distribution. The variability of the manufacturing process is unknown means the same as the standard deviation is unknown.
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