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A sample of 800 voters revealed that 52% of them would vote for a specific issue. Create and interpret a 95% confidence interval for the support of the issue. In the interpretation indicate what type of statement you can make about the issue passing. What is the error of the estimate for this problem? How could you decrease the size of the interval?
Two semiconductor factories are being compared to see if there is a difference in the average defect rates of the chips they produce. In the first factory, 250 chips are sampled. In the second factory, 350 chips are sampled. The proportions of def..
Observations are taken on sales of a certain mountain bike in 30 sporting goods stores. The regression model was Y = total sales (thousands of dollars). Would the intercept seem to have meaning in this regression?
Which of the given is the example of a discrete random variable? Which of the given is an example of continuous random variable?
Median can be a more suitable measure of central tendency than mean if distribution of data is extremely skewed.
The Bottom Line Gift Boutique has been the target of many shoplifters in the past. What is the probability that the shoplifter is a first time offender, given that the shoplifter is a male?
instead of rolling a die 100 times use statcrunch to simulate 100 rolls of a die. use statcrunch to create a random
In studies for a medication, 13 percent of patients gain weight as a side effect. suppose 514 patients are randomly selected. Use the normal approximations to the binomial to approximate probability that
Calculate a value of lambda using the data from last week concerning the news networks and the reporting practices. Compare your resulting lambda to the resulting chi-square from last week.
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.
Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance, as described in each of the following:
Group of businesswomen wish to open a high fashion boutique in a vacant store but only if the average income in the area is at least $45,000. Use alpha=0.01 to test whether or not the businesswomen should open their boutique in this neighborhood.
mars inc. manufactures mampms one of the most popular candy treats in the world. the milk chocolate candies come in a
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